Cambridge International AS & A Level

CHEMISTRY 9701/13
Paper 1 Multiple Choice October/November 2022
1 hour 15 minutes

You must answer on the multiple choice answer sheet.

*2343913768*

You will need: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)

INSTRUCTIONS
 There are forty questions on this paper. Answer all questions.
 For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
 Follow the instructions on the multiple choice answer sheet.
 Write in soft pencil.
 Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
 Do not use correction fluid.
 Do not write on any bar codes.
 You may use a calculator.

INFORMATION
 The total mark for this paper is 40.
 Each correct answer will score one mark.
 Any rough working should be done on this question paper.
 The Periodic Table is printed in the question paper.
 Important values, constants and standards are printed in the question paper.

This document has 16 pages. Any blank pages are indicated.

IB22 11_9701_13/5RP
© UCLES 2022 [Turn over
 2

1 Which sample contains the same number of the named species as the number of molecules in
35.5 g of chlorine?

A atoms in 16 g of sulfur
B atoms in 23 g of sodium
C ions in 74.5 g of potassium chloride
D molecules in 88 g of carbon dioxide

2 Mixture R consists of one mole of C3H6 and one mole of C4H6.

What is the minimum number of moles of oxygen molecules needed for complete combustion of
mixture R?

A 6.5 B 7 C 10 D 20

3 Which statement about the electrons in a ground state carbon atom is correct?

A Electrons are present in four different energy levels.

B There are more electrons in p orbitals than there are in s orbitals.
C The occupied orbital of highest energy is spherical.
D The occupied orbital of lowest energy is spherical.

4 For the element sulfur, which pair of ionisation energies has the largest difference between them?

A third and fourth ionisation energies

B fourth and fifth ionisation energies
C fifth and sixth ionisation energies
D sixth and seventh ionisation energies

5 How many  bonds are present in one H–C≡C–C(CH3)=CH(CH3) molecule?

A 5 B 11 C 13 D 16

6 Which molecule has an equal number of bonding electrons and lone-pair electrons?

A BH3 B CO2 C F2O D SO2

© UCLES 2022 9701/13/O/N/22

 3

7 The table shows properties of four solids held together by different types of bonding.

Which row correctly describes the properties of a solid with a giant covalent structure?

solubility in
melting point
polar solvents

A high insoluble
B high soluble
C low insoluble
D low soluble

8 The carbonate of an s-block element is reacted with an excess of hydrochloric acid.

0.833 g of the carbonate releases 200 cm3 of gas, measured under room conditions.

What is the identity of the metal carbonate?

A Na2CO3 B K2CO3 C MgCO3 D CaCO3

9 The enthalpy changes of formation, , of both PCl 3 and PCl 5 are exothermic.

PCl 3 reacts with chlorine.

PCl 3(l) + Cl 2(g)  PCl 5(s) = –124 kJ mol–1

Which pair of statements is correct?

statement 1 statement 2
A is less negative than The Cl 2 bond energy is needed in calculating
(PCl 5). from enthalpies of formation.
B is more negative than The Cl 2 bond energy is needed in calculating
(PCl 5). from enthalpies of formation.
C is less negative than The Cl 2 bond energy is not needed in calculating
(PCl 5). from enthalpies of formation.
D is more negative than The Cl 2 bond energy is not needed in calculating
(PCl 5). from enthalpies of formation.

© UCLES 2022 9701/13/O/N/22 [Turn over

 4

10 A student mixes 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of
0.350 mol dm–3 hydrochloric acid. The temperature increases by 2.5 C. No heat is lost to the
surroundings.

The final mixture has a specific heat capacity of 4.2 J cm–3 K–1.

What is the molar enthalpy change for the reaction?

A –150 kJ mol–1
B –60 kJ mol–1
C –30 kJ mol–1
D –0.15 kJ mol–1

11 Ammonium ions are converted into nitrate ions by bacteria.

What is the change in the oxidation number of nitrogen?

A –6 B +6 C +8 D +9

12 Sodium dichromate(VI), Na2Cr2O7, reacts with hydrogen peroxide, H2O2, producing Cr3+ ions,
water and oxygen.

What is the correctly balanced ionic equation for this reaction?

A Cr2O72– + 2H+ + H2O2  2Cr3+ + 2H2O + 4O2

B Cr2O72– + 8H+ + 3H2O2  2Cr3+ + 7H2O + 3O2

C Cr2O72– + 8H+ + 6H2O2  2Cr3+ + 10H2O + 6O2

D Cr2O72– + 14H+ + 3H2O2  2Cr3+ + 7H2O + 3O2

13 In which equilibrium reaction is the position of equilibrium moved to the right-hand side by
increasing the temperature and also by decreasing the pressure?

A H2(g) + CO2(g) H2O(g) + CO(g) ∆H = 40 kJ mol–1

B N2O4(g) 2NO2(g) ∆H = 58 kJ mol–1
C 2SO2(g) + O2(g) 2SO3(g) ∆H = –197 kJ mol–1

D 2HI(g) H2(g) + I2(g) ∆H = –10 kJ mol–1

© UCLES 2022 9701/13/O/N/22

 5

14 Ethanol is produced industrially by reacting ethene and steam.

C2H4(g) + H2O(g) C2H5OH(g)

Kp has a value of 1.8  10–5 and the partial pressures of the reactants at equilibrium are shown.

partial pressure
reactant
/ kPa

ethene 4.8  103

steam 2.8  103

Which row is correct?

partial pressure
of ethanol at units of Kp
equilibrium / kPa

A 2.42  102 kPa–1

B 2.42  102 kPa
C 7.47  1011 kPa–1
D 7.47  1011 kPa

15 A large excess of magnesium ribbon is added to dilute hydrochloric acid and the volume of
hydrogen gas produced is measured as the reaction proceeds. The reaction is exothermic.

The results are shown.

total
volume Q
/ cm3

P
time / s

Which row explains the changes in the rate of reaction between points P and Q and between
points Q and R?

between points P and Q between points Q and R

A the reaction temperature is increasing the acid concentration is falling

B the reaction temperature is increasing the magnesium has been used up
C magnesium’s surface area is decreasing the acid concentration is falling
D magnesium’s surface area is decreasing the magnesium has been used up

© UCLES 2022 9701/13/O/N/22 [Turn over

 6

16 Measurements are made to determine the activation energy, Ea, of a reaction.

The diagram shows Ea on the Boltzmann distribution at temperature T1.

number of
molecules

0
0 Ea
energy

Measurements are then made at a higher temperature, T2.

Which diagram correctly shows the Boltzmann distribution and Ea at T2?

A B

number of number of
molecules molecules

0 0
0 Ea 0 Ea
energy energy

C D

number of number of
molecules molecules

0 0
0 Ea 0 Ea
energy energy

© UCLES 2022 9701/13/O/N/22

 7

17 The electrical conductivities of two compounds, Y and Z, are shown.

for Y for Z
conductivity of the compound good does not
in the liquid state conduct
conductivity of the mixture obtained good good
by adding the compound to water

What are compounds Y and Z?

Y Z

A Al 2O3 SiCl 4
B NaCl Al 2O3
C NaCl SiCl 4
D SiCl 4 Al 2O3

18 Which row describes the relative sizes of the ionic radii of Na+, Mg2+ and S2–?

smallest largest

A Na+ Mg2+ S2–

B Mg2+ Na+ S2–
C S2– Na+ Mg2+
D S2– Mg2+ Na+

19 The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water.

Which oxide produces the saturated solution with the highest pH?

A BaO B CaO C MgO D SrO

20 Which row is correct?

the temperature needed to the solubility of

decompose Group 2 metal nitrates Group 2 sulfates

A decreases down the group decreases down the group

B decreases down the group increases down the group
C increases down the group increases down the group
D increases down the group decreases down the group

© UCLES 2022 9701/13/O/N/22 [Turn over

 8

21 Which statement about Group 17 elements and compounds is correct?

A Sodium chloride produces chlorine when reacted with concentrated sulfuric acid.
B Sodium chloride produces chlorine when reacted with bromine.
C Sodium bromide produces bromine when reacted with concentrated sulfuric acid.
D Sodium bromide produces bromine when reacted with iodine in aqueous potassium iodide.

22 Chlorine is bubbled through 100 cm3 of hot 4.0 mol dm–3 sodium hydroxide until the reaction is
complete.

6NaOH(aq) + xCl 2(aq)  yNaCl (aq) + zNaCl O3(aq) + 3H2O(l)

Which row is correct?

[Na+](aq) after
x
reaction / mol dm–3

A 3 4.0
B 3 less than 4.0
C 6 4.0
D 6 less than 4.0

23 Which statement about ammonia or the ammonium ion is correct?

A Ammonia gas is produced when an aqueous solution containing the ammonium ion is
reacted with a strong acid.
B Silver iodide is soluble in a concentrated aqueous solution of ammonia.
C The ammonium ion has the same number of electrons as a methane molecule.
D The square planar ammonium ion contains a dative covalent bond.

24 Sulfur dioxide can be catalytically oxidised by an oxide of nitrogen in the atmosphere.

Which reaction shows how the catalyst is reformed?

A N2 + 2O2 2NO2

B 4NH3 + 5O2  4NO + 6H2O

C N2 + O2  2NO

D NO + 1
O
2 2
 NO2

© UCLES 2022 9701/13/O/N/22

 9

25 Separate 1.0 g samples of Na2O, MgO, Al 2O3, SiO2, NaCl, MgCl 2, Al 2Cl 6 and SiCl 4 are added to
separate beakers containing water and stirred.

The number of beakers containing a white solid is Q.

An excess of NaOH(aq) is then added to each beaker and stirred.

The number of beakers now containing a white solid is R.

Which row is correct?

Q R

A 3 2
B 3 3
C 4 3
D 4 4

26 Which pair of alcohols are isomers of each other?

A butan-1-ol and 2,2-dimethylpropan-1-ol

B butan-2-ol and 2-methylpropan-2-ol
C pentan-1-ol and 2-methylpropan-2-ol
D propan-2-ol and 2-methylpropan-2-ol

27 How many chiral carbon atoms are there in one molecule of 2,2,4,5-tetramethylhexan-3-ol?

A 1 B 2 C 3 D 4

28 Which pair of reagents react together in a redox reaction?

A CH3CHCH2 + Br2
B CH3CH2CH2OH + concentrated H3PO4
C CH3COCH3 + HCN
D HCO2C2H5 + dilute H2SO4

© UCLES 2022 9701/13/O/N/22 [Turn over

 10

29 The structure of santonin is shown.

santonin
CH3

O CH3

CH3 O
O

Santonin is first treated with warm dilute H2SO4. The product of this reaction is treated with cold
dilute acidified KMnO4. A final product, Q, is obtained.

How many atoms of hydrogen in each molecule of product Q will react with sodium metal?

A 2 B 4 C 5 D 6

30 Compound R can be formed from 1-bromopropane using a nucleophilic substitution reaction

followed by an oxidation reaction.

What is the identity of R?

A propanoic acid
B propanone
C propylamine
D propyl ethanoate

31 Three colourless liquids with the following formulae are contained in separate unlabelled bottles.

CH3CH2CO2H CH3CH(OH)CO2H CH3COCO2H

Which two tests, carried out on separate samples of each liquid, will successfully identify each
liquid?

test 1 test 2

A NaHCO3 2,4-DNPH reagent

B NaHCO3 Tollens’ reagent
C warm acidified dichromate 2,4-DNPH reagent
D warm acidified dichromate Tollens’ reagent

© UCLES 2022 9701/13/O/N/22

 11

32 An alcohol, X, reacts with a dicarboxylic acid, Y, to form a double ester, Z.

The diagram shows the structure of the ester.

Z
O O

O O

Which row about the reactants forming ester Z is correct?

the class of the shape of

alcohol X the ring in Y

A secondary non-planar
B secondary planar
C tertiary non-planar
D tertiary planar

33 W reacts with alkaline I2(aq) to form a yellow precipitate and CH3CH2CO2– ions.

Which row identifies W and the yellow precipitate?

identity of
identity of W
yellow precipitate

A butanone CHI3
B butanone CH3I
C propanone CHI3
D propanone CH3I

34 Ethanal reacts with hydrogen cyanide in the presence of KCN to produce a hydroxynitrile.

What is the first step in the mechanism of this reaction?

A B C D
G– G– G– G–
O O O O H+
G+
C CN– G+
C G+
C G+
C
H 3C H H3C H H 3C H H3C H
–
CN CN–

© UCLES 2022 9701/13/O/N/22 [Turn over

 12

35 Structural isomerism and stereoisomerism should be considered when answering this question.

How many isomeric compounds with molecular formula C5H6O4 contain two –CO2H groups and
one C=C double bond?

A 5 B 6 C 7 D 8

36 Compound X reacts with ethanoic acid in the presence of an H+ catalyst to produce the
compound shown.

O H H O

H 3C C C C O C CH3

H H

What is the molecular formula of compound X?

A C2H4O B C2H6O2 C C4H8O D C4H8O2

37 2-bromopropane reacts with hot ethanolic sodium hydroxide.

Which substance is the major product of this reaction?

A propan-1-ol
B propan-2-ol
C 2-hydroxypropene
D propene

38 Which compounds can be used to make Y in a single-step reaction?

OH

1 propanenitrile
2 ethanenitrile
3 propyl ethanoate
4 ethyl propanoate

A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

© UCLES 2022 9701/13/O/N/22

 13

39 The monomer buta-1,3-diene can undergo addition polymerisation in various ways. Two of the
polymers that can be made are called cis-poly(buta-1,3-diene) and trans-poly(buta-1,3-diene). In
these names cis and trans have their usual meanings.

What is the structure of the repeat unit of cis-poly(buta-1,3-diene)?

A B C D

n n n n

40 In the mass spectrum of a compound, Z, the relative abundances of the M and M+1 peaks are in
the ratio 13 : 1.

What is compound Z?

A butyl butanoate
B hexan-3-one
C 2,2,3-trimethylhexane
D 3,3-dimethylpentan-1-ol

© UCLES 2022 9701/13/O/N/22

 14

BLANK PAGE

© UCLES 2022 9701/13/O/N/22

 15

Important values, constants and standards

molar gas constant R = 8.31 J K–1 mol–1

Faraday constant F = 9.65  104 C mol–1
Avogadro constant L = 6.022  1023 mol–1
electronic charge e = –1.60  10–19 C
molar volume of gas Vm = 22.4 dm3 mol–1 at s.t.p. (101 kPa and 273 K)
Vm = 24.0 dm3 mol–1 at room conditions
ionic product of water Kw = 1.00  10–14 mol2 dm–6 (at 298 K (25 C))
specific heat capacity of water c = 4.18 kJ kg–1 K–1 (4.18 J g–1 K–1)

© UCLES 2022 9701/13/O/N/22

© UCLES 2022
The Periodic Table of Elements
Group
1 2 13 14 15 16 17 18
1 2
H He
hydrogen helium
Key 1.0 4.0
3 4 atomic number 5 6 7 8 9 10
Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
6.9 9.0 relative atomic mass 10.8 12.0 14.0 16.0 19.0 20.2
11 12 13 14 15 16 17 18
Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23.0 24.3 3 4 5 6 7 8 9 10 11 12 27.0 28.1 31.0 32.1 35.5 39.9
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

at www.cambridgeinternational.org after the live examination series.

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39.1 40.1 45.0 47.9 50.9 52.0 54.9 55.8 58.9 58.7 63.5 65.4 69.7 72.6 74.9 79.0 79.9 83.8
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
16

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon
85.5 87.6 88.9 91.2 92.9 95.9 – 101.1 102.9 106.4 107.9 112.4 114.8 118.7 121.8 127.6 126.9 131.3

9701/13/O/N/22
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
132.9 137.3 178.5 180.9 183.8 186.2 190.2 192.2 195.1 197.0 200.6 204.4 207.2 209.0 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
138.9 140.1 140.9 144.4 – 150.4 152.0 157.3 158.9 162.5 164.9 167.3 168.9 173.1 175.0
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232.0 231.0 238.0 – – – – – – – – – – –

Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
 Cambridge International AS & A Level

CHEMISTRY 9701/13
Paper 1 Multiple Choice May/June 2022
1 hour 15 minutes

You must answer on the multiple choice answer sheet.

*0009006930*

You will need: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)

INSTRUCTIONS
 There are forty questions on this paper. Answer all questions.
 For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
 Follow the instructions on the multiple choice answer sheet.
 Write in soft pencil.
 Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
 Do not use correction fluid.
 Do not write on any bar codes.
 You may use a calculator.

INFORMATION
 The total mark for this paper is 40.
 Each correct answer will score one mark.
 Any rough working should be done on this question paper.
 The Periodic Table is printed in the question paper.
 Important values, constants and standards are printed in the question paper.

This document has 20 pages. Any blank pages are indicated.

IB22 06_9701_13/6RP
© UCLES 2022 [Turn over
 2

1 Which atom has exactly three unpaired electrons in the ground state?

A an isolated gaseous aluminium atom

B an isolated gaseous carbon atom
C an isolated gaseous chromium atom
D an isolated gaseous phosphorus atom

2 Which element has the second smallest atomic radius in its group and the second highest
electrical conductivity in its period?

A boron
B calcium
C magnesium
D sodium

3 Analysis of the hormone thyroxine gives the results shown.

Heating 0.500 g of thyroxine with aqueous silver nitrate produces 0.604 g of silver iodide. All of
the iodine in the thyroxine sample is converted to silver iodide.

Complete combustion of 0.500 g of thyroxine produces 232 cm3 of carbon dioxide and 7.72 cm3 of
nitrogen, measured under room conditions.

Which molecular formula of thyroxine agrees with these values?

A C15H11NO4I4 Mr = 776.6

B C15H7NO4I8 Mr = 1280.2

C C30H25NO6I4 Mr = 1002.6

D C30H21NO6I8 Mr = 1506.2

4 How many moles of oxygen, O2, are needed to burn 1 mol of ethane if the products of the
reaction are water and carbon only?

A 1.5 B 3 C 3.5 D 5

5 Which compound has the smallest difference in electronegativity between its two elements?

A KF B KBr C LiF D LiBr

© UCLES 2022 9701/13/M/J/22

 3

6 VSEPR theory should be used to answer this question.

Hydrazine has the following structure.

hydrazine
H H

X N N

H H

What is the predicted bond angle X?

A 90 B 107 C 109.5 D 120

7 This question is about buckminsterfullerene, graphite, iodine and diamond.

How many of these substances have a simple molecular structure?

A 0 B 1 C 2 D 3

8 A student reacts 1 mol of magnesium powder in a sealed 0.030 m3 container of oxygen at a

pressure of 2.0  105 Pa and a temperature of 600 K. The magnesium reacts completely to form
MgO.

Which percentage of the oxygen will be used up?

A 5.0% B 10% C 42% D 83%

9 Which equation represents an enthalpy change that is the average bond energy of the C–H bond
in methane?

A 1
4
C(g) + H(g)  1
4
CH4(g)

B 1
4
CH4(g)  1
4
C(g) + H(g)

C CH4(g)  C(g) + 4H(g)

D CH4(g)  CH3(g) + H(g)

© UCLES 2022 9701/13/M/J/22 [Turn over

 4

10 Magnesium carbonate decomposes when heated in a Bunsen burner flame.

Values for the standard enthalpies of formation, , of the species involved are shown.

MgCO3 = –1095.8 kJ mol–1

MgO = –601.7 kJ mol–1
CO2 = –393.5 kJ mol–1

What is the standard enthalpy change for the decomposition of magnesium carbonate?

A +100.6 kJ mol–1
B +887.6 kJ mol–1
C +1095.8 kJ mol–1
D +2091 kJ mol–1

11 NH4NO3 decomposes into N2O and H2O on heating.

Which statements are correct?

1 The ammonium ion is behaving as a reducing agent.

2 The nitrate(V) ion is behaving as an oxidising agent.

3 It is a redox reaction.
4 It is a disproportionation reaction.

A 1, 2, 3 and 4
B 1, 2 and 3 only
C 3 and 4 only
D 3 only

12 A student adds 3 mol of acidified K2Cr2O7 to an excess of I– ions.

The chromium is all reduced to Cr3+ and I– ions are oxidised to I2.

The I2 released is reduced back to I– ions by X mol of S2O32– ions.

1 mol of I2 is reduced by 2 mol of S2O32– ions.

What is the value of X?

A 3 B 6 C 9 D 18

© UCLES 2022 9701/13/M/J/22

 5

13 Which statement about acids and bases is always correct?

A An acid with two H atoms per molecule will be stronger than an acid with one H atom per
molecule.
B A concentrated solution of a strong acid will have a lower pH than a dilute solution of a weak
acid.
C A concentrated solution of a strong base will have a lower pH than a dilute solution of a weak
base.
D A strong acid is more dissociated in solution than a strong base.

14 The reaction between sulfur dioxide and oxygen is reversible.

2SO2(g) + O2(g) 2SO3(g) Kc = 280 mol–1 dm3 at 1000 K

In an equilibrium mixture at 1000 K the sulfur trioxide concentration is 6.00 mol dm–3.

The sulfur dioxide concentration is twice the oxygen concentration.

What is the sulfur dioxide concentration?

A 0.175 mol dm–3

B 0.252 mol dm–3
C 0.318 mol dm–3
D 0.636 mol dm–3

© UCLES 2022 9701/13/M/J/22 [Turn over

 6

15 The Boltzmann distribution of the particles in a mixture of gas X and gas Y is shown in diagram 1.

diagram 1

percentage
of particles

0
0 energy

X and Y react and the reaction causes an increase in gas molecules present. The reaction goes
to completion.

In experiment 1, the increase in volume is measured every 10 seconds. During the reaction, the
temperature and pressure remain constant. The increase in volume is shown in the volume–time
graph in diagram 2.

diagram 2

increase in
volume / cm3

0
0 time / s

In experiment 2, the experiment is repeated using identical amounts of X and Y. A different

temperature is used compared to experiment 1. The same pressure is used. The Boltzmann
distribution of the second mixture of X and Y is shown in diagram 3. During the reaction the
temperature and pressure remain constant.

diagram 3

percentage
of particles

0
0 energy

Which curve on the volume–time graph would show the increase in volume against time for
experiment 2? (The original line for experiment 1 is redrawn as a solid line.)

A
B
increase in
volume / cm3 C

D
0
0 time / s

© UCLES 2022 9701/13/M/J/22

 7

16 When the temperature of a particular reaction is increased by 10 C (e.g. from 20 C to 30 C) the
rate of the reaction approximately doubles.

What is the most significant reason for this increase?

A a different mechanism for the reaction

B an increased collision frequency of the reactant molecules
C more collisions have energy greater than the activation energy
D a reduced activation energy for the reaction

17 Which ion has the smallest radius?

A Al 3+ B Ba2+ C Mg2+ D Na+

18 Which row is correct?

element with the greater element with an

fifth ionisation energy amphoteric oxide

A aluminium aluminium only

B aluminium both aluminium and phosphorus
C phosphorus aluminium only
D phosphorus both aluminium and phosphorus

19 Each of the chlorides listed is added to water.

1 aluminium chloride
2 magnesium chloride
3 silicon tetrachloride
4 phosphorus pentachloride

Which chlorides form an aqueous solution that reacts with sodium carbonate to produce
carbon dioxide?

A 1 and 2 only
B 3 and 4 only
C 1, 3 and 4 only
D 1, 2, 3 and 4

© UCLES 2022 9701/13/M/J/22 [Turn over

 8

20 NaOH(aq) is added to separate samples of magnesium chloride and barium chloride solutions.

H2SO4(aq) is then added slowly to each reaction mixture until in excess.

What is observed at the end of the reaction sequence?

MgCl 2(aq) BaCl 2(aq)

A colourless solution only colourless solution only

B colourless solution only white precipitate
C white precipitate colourless solution only
D white precipitate white precipitate

21 A 4.00 g sample of an anhydrous Group 2 metal nitrate, Z, is heated strongly until there is no
further change of mass. A solid residue of mass 1.37 g is formed.

Which metal is present in Z?

A barium
B calcium
C magnesium
D strontium

© UCLES 2022 9701/13/M/J/22

 9

22 Chlorine is bubbled through a cylinder containing aqueous sodium iodide and an immiscible layer
of hexane.

excess gas out

chlorine gas

hexane

aqueous
sodium iodide

As the bubbles pass through the cylinder, what is observed in the lower and upper layers?

lower aqueous layer upper hexane layer

A colourless solution becomes brown colourless liquid becomes coloured

B colourless solution becomes brown colourless liquid is unchanged
C brown solution becomes colourless colourless liquid becomes coloured
D brown solution becomes colourless colourless liquid is unchanged

23 Chlorine and bromine have different volatilities.

Which row identifies the more volatile of the two elements, and gives the correct explanation?

identity of the explanation for the

more volatile element difference in volatility

A bromine intermolecular forces are greater in

bromine than they are in chlorine
B bromine intermolecular forces are greater in
chlorine than they are in bromine
C chlorine intermolecular forces are greater in
bromine than they are in chlorine
D chlorine intermolecular forces are greater in
chlorine than they are in bromine

© UCLES 2022 9701/13/M/J/22 [Turn over

 10

24 Ammonium chloride dissolves readily in water.

Which statement about the colourless solution formed is correct?

A Ions in the solution can form hydrogen bonds with water molecules.
B The solution is slightly basic.
C The solution would smell of chlorine.
D When sodium hydroxide is added, a gas is formed which turns damp blue litmus paper red.

25 At 550 C nitrogen dioxide reacts with unburnt hydrocarbon fragments, such as CH3, in the
catalytic converter of a motor vehicle.

4CH3 + 7NO2  3 21 N2 + 4CO2 + 6H2O

Which row gives the energy change for this reaction and a possible reason for it?

energy change reason why the reaction is endothermic

of reaction or exothermic

A endothermic chemical energy is converted to heat energy

B endothermic the NN bond energy is very high
C exothermic CO2 and H2O have negative values
D exothermic double bonds are broken in NO2

26 Compound X contains an alcohol group and a carbonyl group.

compound X

OH

Which row is correct?

type of type of
alcohol group carbonyl group

A primary aldehyde
B primary ketone
C tertiary aldehyde
D tertiary ketone

© UCLES 2022 9701/13/M/J/22

 11

27 The diagram shows the skeletal formula of phenazine.

phenazine

What is the empirical formula of phenazine?

A C6H4N B C6H6N C C12H8N2 D C12H12N2

28 The diagram shows the structural formula of mevalonic acid.

mevalonic acid

H OH H H

HO2C C C C C OH

H CH3 H H

Which reagent and conditions will react with mevalonic acid to produce an organic compound
without a chiral carbon atom?

A heat under reflux with CH3OH / H+

B heat under reflux with Cr2O72– / H+
C Na at room temperature
D PCl 5 at room temperature

29 Structural isomerism and stereoisomerism should be considered when answering this question.

Y is a gaseous hydrocarbon which decolourises aqueous bromine.

10.0 g of Y occupies a volume of 3.43 dm3 under room conditions.

How many isomeric structures are possible for Y?

A 4 B 5 C 6 D 7

© UCLES 2022 9701/13/M/J/22 [Turn over

 12

30 Limonene is found in lemon and orange oils.

limonene

What is the major product when limonene reacts with an excess of dry hydrogen chloride?

A B C D

Cl Cl
Cl Cl

Cl
Cl

31 Which statement concerning the hydrolysis of 1-bromopropane with water is correct?

A The hydrolysis reaction between water and 1-iodopropane is faster because the C–Br bond
is less polar than the C–I bond.
B The hydrolysis reaction with water is very slow because water is a weak electrophile.
C The mechanism of the reaction involves the formation of a stable carbocation.
D The reaction is slower with 1-chloropropane because the C–Cl bond is stronger than the
C–Br bond.

© UCLES 2022 9701/13/M/J/22

 13

32 Compound J, C15H23Br2Cl , is reacted with an excess of a hot concentrated solution of

sodium hydroxide in ethanol. One of the products is X.

compound J

excess NaOH
Cl
Br in ethanol
X
Br

What could be the skeletal formula of X?

A B C D

33 Structural isomerism only should be considered when answering this question.

Several compounds with molecular formula C4H8O2 have one carbonyl group and one OH group.

How many of these compounds produce yellow crystals with alkaline I2(aq) at room temperature?

A 2 B 3 C 4 D 5

34 Pentaerythritol is used as an intermediate in the manufacture of paint.

pentaerythritol

HOCH2 CH2OH
C
HOCH2 CH2OH

Which statement is correct?

A Pentaerythritol can be dehydrated by concentrated sulfuric acid to form an alkene.

B The empirical formula and molecular formula of pentaerythritol are different.

C Pentaerythritol does not react with acidified potassium manganate(VII).

D One mole of pentaerythritol gives two moles of hydrogen gas on reaction with an excess of
sodium.

© UCLES 2022 9701/13/M/J/22 [Turn over

 14

35 Which reaction has a nucleophilic addition mechanism and gives a good yield of product under
the stated conditions?

A 1-bromopropane reacting with hot ethanolic sodium hydroxide

B 2-iodopropane reacting with hot aqueous sodium hydroxide
C propanal reacting with hydrogen cyanide under alkaline conditions
D propanal reacting with hydrogen cyanide under acidic conditions

36 A carbonyl compound has the structural formula CH3COCHO.

Which row is correct for the observations made when this compound is treated with the given
reagents?

2,4-DNPH reagent Fehling’s reagent

A silver mirror red precipitate

B silver mirror orange precipitate
C orange precipitate silver mirror
D orange precipitate red precipitate

37 An ester is shown.

H
H H O
H C H
H C C C H

H H O C C H

H
H C H

Which two compounds react to form this ester?

A 2-methylpropan-1-ol and propanoic acid

B 2-methylpropan-2-ol and propanoic acid
C propan-1-ol and 2-methylpropanoic acid
D 2-methylpropan-2-ol and ethanoic acid

© UCLES 2022 9701/13/M/J/22

 15

38 Which compound can be used to make propanoic acid by treatment with a single reagent?

A CH2=CHCH2CH3
B CH3CH2CH2CN
C CH3CH(OH)CN
D CH3CH(OH)CH3

32 34 36
39 A sample of sulfur consists mostly of S. It also contains 4.2% S and 2.8% S. No other
isotopes of sulfur are present.

What is the relative atomic mass, Ar, of this sample of sulfur?

A 32.1 B 32.2 C 34.0 D 34.3

40 One molecule of an addition polymer containing 2000 repeat units has an Mr of 112 000.

The polymer molecule contains chiral centres.

What is a possible monomer for this polymer?

A CH2=CHCH3
B CH2=C(CH3)2
C CH2=CHCH2CH3
D CH2=CHCH2CH2CH3

© UCLES 2022 9701/13/M/J/22

 16

BLANK PAGE

© UCLES 2022 9701/13/M/J/22

 19

Important values, constants and standards

molar gas constant R = 8.31 J K–1 mol–1

Faraday constant F = 9.65  104 C mol–1
Avogadro constant L = 6.02  1023 mol–1
electronic charge e = –1.60  10–19 C
molar volume of gas Vm = 22.4 dm3 mol–1 at s.t.p. (101 kPa and 273 K)
Vm = 24.0 dm3 mol–1 at room conditions
ionic product of water Kw = 1.00  10–14 mol2 dm–6 (at 298 K (25 C))
specific heat capacity of water c = 4.18 kJ kg–1 K–1 (4.18 J g–1 K–1)

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.

Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge
Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.

© UCLES 2022 9701/13/M/J/22

© UCLES 2022
The Periodic Table of Elements
Group
1 2 13 14 15 16 17 18
1 2
H He
hydrogen helium
Key 1.0 4.0
3 4 atomic number 5 6 7 8 9 10
Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
6.9 9.0 relative atomic mass 10.8 12.0 14.0 16.0 19.0 20.2
11 12 13 14 15 16 17 18
Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23.0 24.3 3 4 5 6 7 8 9 10 11 12 27.0 28.1 31.0 32.1 35.5 39.9
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39.1 40.1 45.0 47.9 50.9 52.0 54.9 55.8 58.9 58.7 63.5 65.4 69.7 72.6 74.9 79.0 79.9 83.8
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
20

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon
85.5 87.6 88.9 91.2 92.9 95.9 – 101.1 102.9 106.4 107.9 112.4 114.8 118.7 121.8 127.6 126.9 131.3

9701/13/M/J/22
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
132.9 137.3 178.5 180.9 183.8 186.2 190.2 192.2 195.1 197.0 200.6 204.4 207.2 209.0 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
138.9 140.1 140.9 144.4 – 150.4 152.0 157.3 158.9 162.5 164.9 167.3 168.9 173.1 175.0
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232.0 231.0 238.0 – – – – – – – – – – –
 Cambridge International AS & A Level

CHEMISTRY 9701/12
Paper 1 Multiple Choice February/March 2022
1 hour 15 minutes

You must answer on the multiple choice answer sheet.

*6097847289*

You will need: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)

INSTRUCTIONS
 There are forty questions on this paper. Answer all questions.
 For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
 Follow the instructions on the multiple choice answer sheet.
 Write in soft pencil.
 Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
 Do not use correction fluid.
 Do not write on any bar codes.
 You may use a calculator.

INFORMATION
 The total mark for this paper is 40.
 Each correct answer will score one mark.
 Any rough working should be done on this question paper.
 The Periodic Table is printed in the question paper.
 Important values, constants and standards are printed in the question paper.

This document has 20 pages. Any blank pages are indicated.

IB22 03_9701_12/3RP
© UCLES 2022 [Turn over
 2

1 The first ionisation energy of potassium, K, is 418 kJ mol–1. The first ionisation energy of
strontium, Sr, is 548 kJ mol–1.

Which statement helps to explain why Sr has a greater first ionisation energy than K?

A The charge on a Sr nucleus is greater than the charge on a K nucleus.

B The outer electron in a Sr atom experiences greater shielding than the outer electron in a K
atom.
C The outer electron in a Sr atom experiences spin-pair repulsion.
D The outer electron in a Sr atom is further from the nucleus than the outer electron in a K
atom.

2 What is the electronic configuration of Mg2+?

A 1s2 2s2 2p6

B 1s2 2s2 2p6 3s2
C 1s2 2s2 2p6 3s2 3p2
D 1s2 2s2 2p6 3s2 3p6 3d2 4s2

3 Compound X contains the elements C, H and O only.

2.00 g of X produces 4.00 g of carbon dioxide and 1.63 g of water when completely combusted.

What is the empirical formula of X?

A CHO2 B C2H2O C C2H4O D CH2O2

4 For which molecule is the dipole moment zero?

A CH3Cl B CH2Cl 2 C CHCl 3 D CCl 4

© UCLES 2022 9701/12/F/M/22

 3

5 Which dot-and-cross diagram is correct for Al 2Cl 6?

A B

3+ –
Cl key
2 Al 6 Cl = e
ectrons from Al
= e
ectrons from Cl
Cl Al Cl

Cl Al Cl

Cl

C D

Cl Cl Cl

Cl Al Cl Cl Al Al Cl

Cl Al Cl Cl Cl

Cl

6 The boiling points of some hydrogen halides are shown.

hydrogen halide boiling point / K

H–Cl 188
H–Br 206
H–I 238

What is the explanation for the trend in boiling point for the hydrogen halides from HCl to HI?

A The bond energies of the hydrogen halides increase from HCl to HI.

B There is an increase in the strength of the intermolecular forces of attraction from HCl to HI.

C The intermolecular hydrogen bonds become stronger from HCl to HI.

D There is an increase in the bond polarity from HCl to HI.

© UCLES 2022 9701/12/F/M/22 [Turn over

 4

7 Elements X, Y and Z are all in the first two periods of the Periodic Table.

Their Pauling electronegativity values, EN, are shown.

element EN

X 1.0
Y 2.1
Z 4.0

Substances exist with formulae XZ, YZ and Z2.

Which row puts these substances in order of increasing melting point?

lowest highest
melting point melting point

A XZ YZ Z2
B XZ Z2 YZ
C Z2 YZ XZ
D Z2 XZ YZ

8 The equation for reaction 1 is shown.

reaction 1 C6H12O6  2CO2 + 2C2H5OH

C6H12O6 a
C2H5OH b

What is the correct expression for the enthalpy change of reaction 1?

A a+b B a–b C a + 2b D a – 2b

© UCLES 2022 9701/12/F/M/22

 5

9 Nitrogen monoxide is an atmospheric pollutant that is formed inside car engines by an

endothermic reaction between nitrogen and oxygen.

N2(g) + O2(g)  2NO(g)

Which diagram correctly represents the energy profile for this reaction?

A B

products products
energy Ea energy Ea
reactants
H reactants
H

0 0
0 progress of 0 progress of
reaction reaction

C D

reactants Ea reactants Ea
energy
H energy
H
products products

0 0
0 progress of 0 progress of
reaction reaction

10 Two half-equations are shown.

MnO4– + 2H2O + 3e–  MnO2 + 4OH–

2OH– + SO32–  SO42– + H2O + 2e–

The equation for the reaction between manganate(VII) ions and sulfite ions is shown.

uMnO4– + vH2O + wSO32–  xMnO2 + ySO42– + zOH–

Which statements are correct?

1 u=x=z
2 Manganese is reduced to oxidation state +4.
3 Sulfur is oxidised from oxidation state +4 to +6.

A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

© UCLES 2022 9701/12/F/M/22 [Turn over

 6

11 Hydrogen peroxide, H2O2, decomposes to form water and oxygen.

The reaction is catalysed by bromide ions.

step 1 2Br –(aq) + H2O2(aq) + 2H+(aq)  2H2O(l) + Br2(aq)

step 2 H2O2(aq) + Br2(aq)  2Br –(aq) + 2H+(aq) + O2(g)

Which row is correct?

type of catalyst in step 1

A heterogeneous bromide ions are oxidised

B heterogeneous bromide ions are reduced
C homogeneous bromide ions are oxidised
D homogeneous bromide ions are reduced

12 Hydrogen and iodine react to form hydrogen iodide in an exothermic reaction. The equation is
shown.

H2(g) + I2(g) 2HI(g)

A 1 m3 reaction vessel contains H2, I2 and HI gases at equilibrium. The temperature is changed
such that the total pressure in the 1 m3 vessel doubles.

What is the effect on the value of Kp and on the position of equilibrium?

effect on the effect on the

value of Kp position of equilibrium

A decreases moves left

B increases moves right
C no change moves left
D no change no change

© UCLES 2022 9701/12/F/M/22

 7

13 Diethylzinc, (C2H5)2Zn, is added to NaOH(aq). Two reactions occur.

reaction 1 (C2H5)2Zn + H2O  ZnO + 2C2H6

reaction 2 H2O + ZnO + 2OH–  Zn(OH)42–

In these reactions, which compounds act as Brønsted–Lowry acids?

reaction 1 reaction 2

A (C2H5)2Zn H2O
B H2O H2O
C H2O ZnO
D the reaction is not acid / base ZnO

14 Which statement about atoms and molecules is correct?

A The molecular formula of a compound is the simplest whole number ratio of atoms of each
element in the compound.

B One mole of any substance contains 6  1023 atoms.

C The relative atomic mass of an element is the ratio of the average mass of one atom of the
element to the mass of an atom of carbon-12.
D The relative formula mass of a compound is the sum of the individual atomic masses of all
the atoms in the formula.

© UCLES 2022 9701/12/F/M/22 [Turn over

 8

15 The Boltzmann distribution for one mole of a gas at temperature T is shown.

number of
particles with
energy, E

0
0 energy, E

One mole of the same gas is added, and the gas remains at temperature T.

Which dotted curve shows the distribution with the added gas?

A B

number of number of
particles with particles with
energy, E energy, E

0 0
0 energy, E 0 energy, E

C D

number of number of
particles with particles with
energy, E energy, E

0 0
0 energy, E 0 energy, E

© UCLES 2022 9701/12/F/M/22

 9

16 In the reaction shown, the concentrations of both X and Y are reduced to half of their original
values whilst keeping the total volume of the solution constant.

X(aq) + Y(aq)  XY(aq)

Simultaneously the temperature is increased from 298 K to 348 K.

Which prediction is definitely true?

A A smaller proportion of collisions between particles of X and particles of Y will be successful.

B The average kinetic energy of particles of X and particles of Y will increase.
C The rate of the reaction will be unaffected.
D The frequency of collisions between particles of X and particles of Y will halve.

17 A student investigated the chloride of a Period 3 element. This is what the student wrote down as
a record.

The compound was a white crystalline solid. It dissolved easily in water to

give a solution of pH 12. When placed in a test-tube and heated in a
roaring Bunsen flame, the compound melted after several minutes heating.

What can be deduced from this record?

A At least one of the recorded observations is incorrect.

B The compound was magnesium chloride, MgCl 2.

C The compound was phosphorus pentachloride, PCl 5.

D The compound was sodium chloride, NaCl.

18 The elements in Period 3 and their compounds show trends across the period from sodium to
chlorine.

Which row is correct?

electronegativity acid / base behaviour of

of the elements the oxides of the elements

A decreases basic  amphoteric  acidic

B decreases acidic  amphoteric  basic
C increases basic  amphoteric  acidic
D increases acidic  amphoteric  basic

© UCLES 2022 9701/12/F/M/22 [Turn over

 10

19 The table shows the melting points of SiO2 and P4O6.

oxide SiO2 P4O6

melting point / K 1883 297

Which statement explains the difference between the melting points of SiO2 and P4O6?

A The bonding of the oxides changes from ionic to covalent.

B The metallic character of the elements decreases across Period 3.
C The oxidation number of the element increases from Si to P.
D The structure changes from giant molecular to simple molecular.

20 Equal masses of CaCO3, Ca(NO3)2, BaCO3 and Ba(NO3)2 are thermally decomposed. The
volume of gas produced in each experiment is measured under the same conditions.

Which compound will produce the greatest volume of gas?

A CaCO3 B Ca(NO3)2 C BaCO3 D Ba(NO3)2

21 Which row gives correct comparisons between the solubilities of calcium hydroxide and
barium hydroxide and the thermal stabilities of calcium carbonate and barium carbonate?

solubility thermal stability

calcium hydroxide barium hydroxide calcium carbonate barium carbonate

A higher lower higher lower

B higher lower lower higher
C lower higher higher lower
D lower higher lower higher

22 Which statement relating to the elements in Group 17 and their compounds is correct?

A Bromine will reduce KI to form iodine.

B Iodide ions react to form a white precipitate when added to silver nitrate solution.
C Bromide ions react to form a white precipitate when added to silver nitrate solution.
D Chlorine reacts with hydrogen to form a colourless gas.

23 An excess of chlorine was bubbled into 100 cm3 of hot 6.0 mol dm–3 sodium hydroxide.

How many moles of sodium chloride would be produced in the reaction?

A 0.30 B 0.50 C 0.60 D 0.72

© UCLES 2022 9701/12/F/M/22

 11

24 The product of the Contact process is Z.

Which reaction or process leads to the formation of a gas that can neutralise an aqueous solution
of Z?

A atmospheric lightning
B combustion of fuel in an internal combustion engine
C the Haber process
D thermal decomposition of Group 2 nitrates

25 When ammonia, NH3, is dissolved in water, a small concentration of ammonium ions, NH4+, is
formed.

Which row is correct?

number of change of the H–N–H

electrons in one angle from ammonia
ammonium ion to the ammonium ion

A 8 decreases
B 8 increases
C 10 decreases
D 10 increases

26 In this question, alkenes and cyclic alkanes should be considered.

How many structural isomers of C4H8 are there?

A 3 B 4 C 5 D 6

27 Which compound will decolourise Br2(aq)?

A CH3CH2CH2CH2CH2CO2H
B CH3CH2CH2CH2CH2CHO
C CH3CHCHCH2CH2CH2OH
D CH3CH2CH2CO2CH2CH3

© UCLES 2022 9701/12/F/M/22 [Turn over

 12

28 Alkenes react with aqueous hydrogen bromide. The reaction proceeds via an intermediate
carbocation. The more stable the intermediate, the faster the reaction.

Which sequence correctly shows an increase in the speed of reaction of the alkenes with
hydrogen bromide?

A ethene, propene, 2-methylpropene

B 2-methylpropene, ethene, propene
C propene, ethene, 2-methylpropene
D propene, 2-methylpropene, ethene

29 A reaction occurs when a sample of 1-chloropropane is heated under reflux with

sodium hydroxide dissolved in ethanol.

Which row is correct?

type of reaction name of product

A elimination propan-1-ol
B elimination propene
C substitution propan-1-ol
D substitution propene

30 The diagram shows the structures of three halogenoalkanes.

P Q R

CH3 H H

CH3 C Br H C Br H C Cl

CH3 H H

P, Q and R can all be hydrolysed.

Which row is correct?

relative speed mechanism

of hydrolysis of hydrolysis
Q R P Q

A fast slow SN1 SN2

B fast slow SN2 SN1
C slow fast SN1 SN2
D slow fast SN2 SN1

© UCLES 2022 9701/12/F/M/22

 13

31 A sample of 2.30 g of ethanol is mixed with an excess of aqueous acidified potassium

dichromate(VI). The reaction mixture is boiled under reflux for one hour. The required organic
product is then collected by distillation. The yield of product is 60.0%.

Which mass of product is collected?

A 1.32 g B 1.38 g C 1.80 g D 3.00 g

32 The structure of tartaric acid is shown.

tartaric acid

OH O
HO
OH
O OH

Four moles of substance X react with one mole of tartaric acid.

What could be substance X?

A sodium
B sodium carbonate
C sodium hydrogencarbonate
D sodium hydroxide

33 Which compound gives both:

● an orange precipitate with 2,4-DNPH reagent

● and a yellow precipitate with alkaline I2(aq)?

A ethanol
B methanal
C propanal
D propanone

© UCLES 2022 9701/12/F/M/22 [Turn over

 14

34 A student suggests two uses of LiAl H4.

LiAl H4
reaction 1 CH3 CH CH2 CH3 CH2 CH3

LiAl H4
reaction 2 CH3CO2H CH3CH2OH

Which reactions would give the product shown?

A both reactions
B reaction 1 only
C reaction 2 only
D neither reaction

35 Compound X contains a single ester group.

X contains 27.6% by mass of oxygen.

Which pair of products could be produced by the hydrolysis of X?

A butan-1-ol and ethanoic acid

B ethanol and propanoic acid
C methanol and methanoic acid
D propan-2-ol and butanoic acid

36 What is the least number of carbon atoms in a non-cyclic alkane molecule that has a chiral
centre?

A 7 B 8 C 9 D 10

37 A molecule of a polymer contains the sequence shown.

H H H H H Cl H H H Cl H H

C C C C C C C C C C C C

H Cl Cl H H H Cl H H H H Cl

Which monomer could produce this polymer by addition polymerisation?

A CHCl =CHCl
B CH2=CHCl
C CH3CCl =CHCl

D CH3CCl =CH2

© UCLES 2022 9701/12/F/M/22

 15

38 Compound Y is heated with a mild oxidising agent. One of the products of the reaction reacts with
hydrogen cyanide forming 2-hydroxybutanenitrile.

What is compound Y?

A butan-1-ol
B butan-2-ol
C propan-1-ol
D propan-2-ol

39 The diagrams show the structures of lycopene and -carotene.

lycopene
CH3
CH3 CH3
CH3 CH3

CH3 CH3 CH3 CH3

CH3

β-carotene
CH3
CH3 CH3
CH3 CH3

CH3 CH3 CH3 CH3

CH3

When lycopene is converted into -carotene, what is the gain or loss of hydrogen atoms per
molecule?

A 4 gained
B 2 gained
C no change
D 2 lost

© UCLES 2022 9701/12/F/M/22 [Turn over

 16

40 Which diagram shows the infrared spectrum of a compound that contains both a C=O and an
O–H group?

A B
100 100
transmittance / %

transmittance / %
50 50

0 0
3000 2000 1000 3000 2000 1000
–1 –1
wavenumber / cm wavenumber / cm

C D
100 100
transmittance / %

transmittance / %

50 50

0 0
3000 2000 1000 3000 2000 1000
–1 –1
wavenumber / cm wavenumber / cm

bond functional group containing the bond characteristic infrared absorption range
(in wavenumbers) / cm–1
C–O hydroxy, ester 1040–1300
C=C aromatic compound, alkene 1500–1680
C=O amide 1640–1690
carbonyl, carboxyl 1670–1740
ester 1710–1750
C≡N nitrile 2200–2250
C–H alkane 2850–3100
N–H amine, amide 3300–3500
O–H carboxyl 2500–3000
hydroxy 3200–3650

© UCLES 2022 9701/12/F/M/22

 19

Important values, constants and standards

molar gas constant R = 8.31 J K–1 mol–1

Faraday constant F = 9.65  104 C mol–1
Avogadro constant L = 6.022  1023 mol–1
electronic charge e = –1.60  10–19 C
molar volume of gas Vm = 22.4 dm3 mol–1 at s.t.p. (101 kPa and 273 K)
Vm = 24.0 dm3 mol–1 at room conditions
ionic product of water Kw = 1.00  10–14 mol2 dm–6 (at 298 K (25 C))
specific heat capacity of water c = 4.18 kJ kg–1 K–1 (4.18 J g–1 K–1)

© UCLES 2022 9701/12/F/M/22

© UCLES 2022
The Periodic Table of Elements
Group
1 2 13 14 15 16 17 18
1 2
H He
hydrogen helium
Key 1.0 4.0
3 4 atomic number 5 6 7 8 9 10
Li Be atomic symbol B C N O F Ne
lithium beryllium name boron carbon nitrogen oxygen fluorine neon
6.9 9.0 relative atomic mass 10.8 12.0 14.0 16.0 19.0 20.2
11 12 13 14 15 16 17 18
Na Mg Al Si P S Cl Ar
sodium magnesium aluminium silicon phosphorus sulfur chlorine argon
23.0 24.3 3 4 5 6 7 8 9 10 11 12 27.0 28.1 31.0 32.1 35.5 39.9
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

at www.cambridgeinternational.org after the live examination series.

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton
39.1 40.1 45.0 47.9 50.9 52.0 54.9 55.8 58.9 58.7 63.5 65.4 69.7 72.6 74.9 79.0 79.9 83.8
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
20

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon
85.5 87.6 88.9 91.2 92.9 95.9 – 101.1 102.9 106.4 107.9 112.4 114.8 118.7 121.8 127.6 126.9 131.3

9701/12/F/M/22
55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
lanthanoids
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon
132.9 137.3 178.5 180.9 183.8 186.2 190.2 192.2 195.1 197.0 200.6 204.4 207.2 209.0 – – –
87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
actinoids
Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson
– – – – – – – – – – – – – – – – –

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium
138.9 140.1 140.9 144.4 – 150.4 152.0 157.3 158.9 162.5 164.9 167.3 168.9 173.1 175.0
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium
– 232.0 231.0 238.0 – – – – – – – – – – –

Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
 Cambridge International AS & A Level

CHEMISTRY 9701/12
Paper 1 Multiple Choice October/November 2021
1 hour

You must answer on the multiple choice answer sheet.

*8531315998*

You will need: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)
Data booklet

INSTRUCTIONS
 There are forty questions on this paper. Answer all questions.
 For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
 Follow the instructions on the multiple choice answer sheet.
 Write in soft pencil.
 Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
 Do not use correction fluid.
 Do not write on any bar codes.
 You may use a calculator.

INFORMATION
 The total mark for this paper is 40.
 Each correct answer will score one mark.
 Any rough working should be done on this question paper.

This document has 16 pages. Any blank pages are indicated.

IB21 11_9701_12/3RP
© UCLES 2021 [Turn over
 2

Section A

For each question there are four possible answers A, B, C and D. Choose the one you consider to be
correct.

Use of the Data Booklet may be appropriate for some questions.

1 Compound X consists of 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass.

What is the empirical formula of compound X?

A CH2O B C2H2O C C2H4O D CHO

2 Which statement is correct?

A 1.0 g of hydrogen gas contains 3.0  1023 atoms.

B 4.0 g of helium gas contains 1.2  1024 atoms.

C 16 g of methane gas contains 3.0  1024 atoms.

D 44 g of carbon dioxide gas contains 6.0  1023 atoms.

3 Technetium (Tc) is a second row transition element that does not occur naturally on Earth. One of
its isotopes has 56 neutrons.

What is the nucleon number of this isotope?

A 43 B 56 C 99 D 112

4 Which atom has more unpaired electrons than paired electrons in orbitals of principal quantum
number 2?

A carbon
B nitrogen
C oxygen
D fluorine

© UCLES 2021 9701/12/O/N/21

 3

5 Atom X is the central atom in a molecule.

In this molecule, atom X has four pairs of valence electrons in its outer shell.

The four pairs of valence electrons include at least one bond pair and at least one lone pair.

What could be a possible shape for the molecule?

A linear
B non-linear
C trigonal bipyramidal
D trigonal planar

6 Which molecule has the largest overall dipole?

A B C D
Cl Cl H Cl

C C O C O C O C O

Cl Cl H Cl

7 The strength of hydrogen bonding increases as the electronegativity of the element bonded to
hydrogen increases.

Some information for a range of hydrides is given.

boiling point
hydride
/K

PH3 185
HCl 188
HF 293
H2O 373

Which statement and reason about these hydrides is correct?

A The boiling point of PH3 is much lower than the boiling point of H2O because PH3 does not
form hydrogen bonds or instantaneous dipole-induced dipole forces between its molecules.
B The boiling point of HF is higher than the boiling point of HCl because the bond energy of
H–F is greater than the bond energy of H–Cl.
C The boiling point of H2O is higher than the boiling point of HF because each hydrogen bond
between the H2O molecules is stronger than each hydrogen bond between HF molecules.
D The boiling points of PH3 and HCl are similar because the molecules of PH3 and HCl have
the same number of electrons and similar intermolecular forces.

© UCLES 2021 9701/12/O/N/21 [Turn over

 4

8 The general gas equation can be used to calculate the value of the Mr of a gas.

For a sample of a gas of mass m grams, which expression will give the value of Mr?
mRT pVRT mpV pV
A Mr = B Mr = C Mr = D Mr =
pV m RT mRT

9 The equation for the formation of ammonium chloride is shown.

NH3(g) + HCl (g) NH4Cl (s) H = –314 kJ mol–1

Which diagram shows the correctly labelled reaction pathway diagram for the decomposition of
ammonium chloride?

A B

EA NH3 + HCl NH3 + HCl

energy energy EA
∆H ∆H

NH4Cl NH4Cl

progress of reaction progress of reaction

C D

NH4Cl EA NH4Cl

energy energy EA
∆H ∆H

NH3 + HCl NH3 + HCl

progress of reaction progress of reaction

© UCLES 2021 9701/12/O/N/21

 5

10 In a catalytic converter in the exhaust system of a car, carbon monoxide is oxidised to carbon
dioxide, and nitrogen monoxide is reduced to nitrogen.

What are the changes in oxidation number of carbon and nitrogen in these two processes?

carbon nitrogen

A –2 +2
B –1 +1
C +1 –1
D +2 –2

11 NO and NO2 are both present in the lower atmosphere as pollutants.

The reaction sequence shows the production of ozone from oxygen in the lower atmosphere.

This sequence repeats many times.

NO2(g)  NO(g) + O(g)

NO(g) + 1
2
O2(g)  NO2(g)

O2(g) + O(g)  O3(g)

Which statement about this reaction sequence is correct?

A NO is acting as a catalyst, but NO2 is not acting as a catalyst.

B NO2 is acting as a catalyst, but NO is not acting as a catalyst.
C Neither NO nor NO2 are acting as catalysts.
D Both NO and NO2 are acting as catalysts.

12 A mixture of two Period 3 oxides are added to water. A solution forms with a pH of just below 7.

What could be the constituents of the mixture?

A Al 2O3 and MgO

B Na2O and MgO
C Na2O and P4O10
D SO3 and P4O10

© UCLES 2021 9701/12/O/N/21 [Turn over

 6

13 Which statement about the compounds of the Group 2 metals is correct?

A Barium carbonate is less thermally stable than strontium carbonate.

B Barium sulfate is less soluble than magnesium sulfate.
C Calcium hydroxide is less soluble than magnesium hydroxide.
D Calcium nitrate is more thermally stable than strontium nitrate.

14 A 0.005 mol sample of anhydrous calcium carbonate is completely thermally decomposed to give
100 cm3 of gas.

In a separate experiment carried out under the same conditions, a 0.005 mol sample of
anhydrous calcium nitrate is completely thermally decomposed. The volume of gaseous products
is measured.

What total volume of gaseous products is produced from the calcium nitrate?

A 50 cm3 B 100 cm3 C 200 cm3 D 250 cm3

15 Redox reactions are common in the chemistry of Group 17 elements.

Which statement is correct?

A Br – ions will reduce Cl 2 but not I2.

B Cl 2 will oxidise Br – ions but not I– ions.

C F2 is the weakest oxidising agent out of F2, Cl 2, Br2 and I2.

D I– ions are the weakest reducing agent out of F –, Cl –, Br – and I–.

© UCLES 2021 9701/12/O/N/21

 7

16 Silver chloride and silver iodide form equilibria when added to water.

AgCl (s) Ag+(aq) + Cl –(aq) Kc = K1

AgI(s) Ag+(aq) + I–(aq) Kc = K2

Each equilibrium position lies well to the left.

Silver iodide will not dissolve in aqueous ammonia. Silver chloride will dissolve in aqueous
ammonia. Another equilibrium is formed.

Ag+(aq) + 2NH3(aq) Ag(NH3)2+(aq) Kc = K3

The position of this equilibrium lies to the right.

What is the order of magnitude for these three equilibrium constants?

smallest largest

A K3 K2 K1
B K3 K1 K2
C K2 K1 K3
D K1 K2 K3

17 X is the ion of a metal which burns with a red flame.

Y is an ion that reacts with concentrated H2SO4 to produce H2S.

What could be the formula of a compound containing X and Y?

A BaBr2 B BaI2 C SrBr2 D SrI2

18 Oxides of nitrogen are present in the environment due to natural and man-made sources.

Which row is correct?

natural source of nitrogen oxides man-made source of nitrogen oxides

A electrical discharges in the atmosphere internal combustion engines

B electrical discharges in the atmosphere as a by-product of the Haber process
C decomposition of dead plants in rivers internal combustion engines
D decomposition of dead plants in rivers as a by-product of the Haber process

© UCLES 2021 9701/12/O/N/21 [Turn over

 8

19 Magnesium hydroxide dissolves in aqueous ammonium chloride, but not in aqueous sodium
chloride.

Which statement explains this observation?

A The ionic radius of the NH4+ ion is similar to that of Mg2+ but not that of Na+.
B NH4Cl dissociates less fully than NaCl.
C The Na+ and Mg2+ ions have the same number of electrons.
D The NH4+ ion can donate a proton.

20 The formula of hydrocortisone acetate is shown.

hydrocortisone acetate

O CH2OCOCH3
CH3
HO OH

CH3

Which row is correct?

number of C atoms number of chiral atoms

in one molecule in one molecule

A 22 7
B 22 8
C 23 7
D 23 8

21 Bromomethane, CH3Br, decomposes in the stratosphere forming methyl free radicals and
bromine free radicals.

Which row correctly describes this decomposition?

number of electrons in
type of bond fission
a bromine free radical

A homolytic 35
B heterolytic 35
C homolytic 36
D heterolytic 36

© UCLES 2021 9701/12/O/N/21

 9

22 Structural and stereoisomerism should be taken into account when answering this question.

Y is a gaseous hydrocarbon which decolourises aqueous bromine. It contains no rings.

10.0 g of Y occupies a volume of 3.43 dm3 under room conditions.

How many isomeric structures are possible for Y?

A 4 B 5 C 6 D 7

23 Which equation represents a valid propagation step in the chlorination of ethane?

A C2H5Cl + Cl •  C2H4Cl • + HCl

B C2H6 + Cl •  C2H5Cl + H•

C C2H5Cl + H•  C2H5• + HCl

D C2H5• + Cl •  C2H5Cl

24 Butanoic acid can be made from 1-bromopropane in two stages.

stage 1 CH3CH2CH2Br  CH3CH2CH2CN

stage 2 CH3CH2CH2CN  CH3CH2CH2CO2H

Which types of reaction are stage 1 and stage 2?

stage 1 stage 2

A electrophilic addition hydrolysis

B electrophilic addition oxidation
C nucleophilic substitution hydrolysis
D nucleophilic substitution oxidation

25 A halogenoalkane has the molecular formula C5H11Br. The halogenoalkane does not form an
alkene when treated with ethanolic sodium hydroxide.

What could be the halogenoalkane?

A 1-bromo-2-methylbutane
B 2-bromo-2-methylbutane
C 3-bromopentane
D 1-bromo-2,2-dimethylpropane

© UCLES 2021 9701/12/O/N/21 [Turn over

 10

26 Compound P is heated under reflux with an excess of acidified potassium dichromate(VI) to form
compound Q.

Compound Q has a lower boiling point than compound P.

What could be compound P?

A 2-methylbutan-1-ol
B 2-methylbutan-2-ol
C pentan-1-ol
D pentan-2-ol

27 Structural and stereoisomerism should be taken into account when answering this question.

An organic compound, X, is dehydrated by heating with concentrated phosphoric(V) acid.

Only two organic products are formed.

What could be X?

A B C D
OH OH
OH

OH OH

28 Which compound produces a precipitate with 2,4-dinitrophenylhydrazine reagent and also with
alkaline aqueous iodine?

A butan-2-ol
B butanal
C butanone
D pentan-3-one

© UCLES 2021 9701/12/O/N/21

 11

29 Organic compound Z has an alcohol group and a carboxylic acid group.

Compound Z reacts with magnesium carbonate to make a salt with a relative formula mass of
230.3.

Compound Z does not react with acidified potassium manganate(VII).

What could be the identity of compound Z?

A 2-hydroxy-2-methylbutanoic acid
B 2-hydroxy-2-methylpropanoic acid
C 3-hydroxy-2-methylbutanoic acid
D 3-hydroxy-2-methylpropanoic acid

30 The infra-red spectrum of Y is shown.

100

transmittance / %
50

0
4000 3000 2000 1500 1000 500
wavenumber / cm–1

What could Y be?

A CH3CO2C2H5
B CH2(OH)CH=CHCH2OH
C CH3(CH2)2CO2H
D CH2(OH)(CH2)2CHO

© UCLES 2021 9701/12/O/N/21 [Turn over

 12

Section B

For each of the questions in this section, one or more of the three numbered statements 1 to 3 may
be correct.

Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against
the statements that you consider to be correct).

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

Use of the Data Booklet may be appropriate for some questions.

31 The Boltzmann distribution diagram shows a fixed amount of a gas at two different temperatures,
T1 and T2.

T1
T2 activation
energy

number of
particles with
energy, E

0
0 molecular energy, E

Which statements correctly describe the features of this diagram?

1 Temperature T1 is lower than temperature T2.

2 The shaded area indicates the particles that have sufficient energy to react at T2.
3 The total area under each curve is the same for both temperatures.

© UCLES 2021 9701/12/O/N/21

 13

32 Four solutions, each of concentration 0.1 mol dm–3, were tested with a pH meter. The results are
shown.

solution formula of acid or base pH

acid 1 CH3CO2H 4
acid 2 HNO3 1
base 1 CH3NH2 11
base 2 NaOH 14

Which statements explain these results?

1 Acid 2 has a lower pH than acid 1 because it is more soluble.

2 Base 2 has a higher concentration of hydroxide ions in solution than base 1.
3 Acid 1 dissociates less than acid 2.

33 Which reactions are redox reactions?

1 Mg + 2HCl  MgCl 2 + H2

2 2K2CrO4 + 2H+  K2Cr2O7 + 2K+ + H2O

3 CuCO3 + 2HCl  CuCl 2 + H2O + CO2

34 When the liquid N2F4 is heated, it decomposes into a single product, X.

Which statements are correct?

1 N–F bonds are broken during this decomposition.

2 The enthalpy change when N2F4 decomposes into X is approximately +160 kJ mol–1.
3 Molecules of X are non-linear.

35 The following statements compare some properties of the oxides and chlorides of sodium and
silicon.

Which statements are correct?

1 The melting point of SiCl 4 is higher than the melting point of SiO2.
2 SiCl 4 reacts with water, NaCl does not.
3 The melting point of SiCl 4 is lower than the melting point of NaCl.

© UCLES 2021 9701/12/O/N/21 [Turn over

 14

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

36 Which statements about ammonium chloride are correct?

1 It reacts with hot aqueous sodium hydroxide to produce an alkaline gas.

2 In solution, it reacts with aqueous silver nitrate to produce a white precipitate.
3 When solid, it reacts with concentrated sulfuric acid to produce chlorine.

37 What is the same for a pair of optical isomers?

1 their empirical formula

2 their functional groups
3 their structural formula

38 Which of the molecular formulae represent at least one compound that can undergo addition
polymerisation?

1 C4H8
2 C2H3Cl
3 C3H6O

39 Which of the reactions give products containing a chiral centre?

1 CH2(OH)COCO2H + an excess of HCN

2 CH2(OH)COCO2H + an excess of NaBH4
3 CH2(OH)COCO2H + an excess of LiAl H4

40 Ethyl butanoate is heated with a dilute aqueous solution of sodium hydroxide.

Which substances are products of this reaction?

1 sodium butanoate
2 water
3 sodium ethanoate

© UCLES 2021 9701/12/O/N/21

 Cambridge International AS & A Level

CHEMISTRY 9701/13
Paper 1 Multiple Choice May/June 2021
1 hour

You must answer on the multiple choice answer sheet.

*9003800186*

You will need: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)
Data booklet

INSTRUCTIONS
 There are forty questions on this paper. Answer all questions.
 For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
 Follow the instructions on the multiple choice answer sheet.
 Write in soft pencil.
 Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
 Do not use correction fluid.
 Do not write on any bar codes.
 You may use a calculator.

INFORMATION
 The total mark for this paper is 40.
 Each correct answer will score one mark.
 Any rough working should be done on this question paper.

This document has 16 pages. Any blank pages are indicated.

IB21 06_9701_13/2RP
© UCLES 2021 [Turn over
 2

Section A

For each question there are four possible answers A, B, C and D. Choose the one you consider to be
correct.

Use of the Data Booklet may be appropriate for some questions.

1 Compound X is an organic compound that contains 30.6% carbon, 3.8% hydrogen, 20.4%
oxygen and 45.2% chlorine by mass.

What is the empirical formula of X?

A C2H3OCl B C2H4OCl C C3H4OCl D C4H3O2Cl 2

2 A sample of propane, C3H8, with a mass of 9.61 g is completely combusted in an excess of

oxygen under room conditions.

Which volume of carbon dioxide gas is produced?

A 4.89 dm3 B 5.24 dm3 C 14.7 dm3 D 15.7 dm3

3 Which atom has the same number of electrons as an ammonium ion?

A Mg B Na C Ne D O

4 Ethanal reacts with hydroxylamine, NH2OH, to form the molecule shown.

H H
y z

H C C N O H
x
H

What is the order of increasing bond angle in this structure from smallest to largest?

A z, x, y B y, z, x C x, z, y D z, y, x

© UCLES 2021 9701/13/M/J/21

 3

5 Descriptions of the bonding in three substances are given.

substance 1 strong covalent bonds between atoms, permanent dipole-dipole

attractions between molecules
substance 2 strong covalent bonds between atoms, weak forces between molecules
substance 3 strong covalent bonds between atoms, hydrogen bonding between
molecules

Which compounds could be substances 1, 2 and 3?

substance 1 substance 2 substance 3

A CH3OH Al 2Cl 6 CH2Cl 2

B Al 2Cl 6 CH2Cl 2 CH4
C CH2Cl 2 CH4 CH3OH
D CH4 CH3OH H2O

6 Which type of bonding is never found in elements?

A covalent
B ionic
C metallic
D van der Waals’ forces

7 Using the information in the table, what is the enthalpy change, q, for the reaction described?

Cs+(g) + Br –(g)  CsBr(s) ∆H = q kJ mol–1

standard value
enthalpy change / kJ mol–1

H sol
o
CsBr(s) +25.9
H hyd
o
Cs+(g) –276
H hyd
o
Br –(g) –335

A –636.9 B –585.1 C +585.1 D +636.9

© UCLES 2021 9701/13/M/J/21 [Turn over

 4

8 Which enthalpy change is indicated by X in the enthalpy cycle shown?

C(s) + 2H2(g) + 2O2(g)

CH4(g) CO2(g) + X

CH4(g)
CH4(g) + 2O2(g) CO2(g) + 2H2O(l)

A – 4  the enthalpy of combustion of hydrogen

B + 4  the enthalpy of combustion of hydrogen

C – 2  the enthalpy of formation of water

D + 2  the enthalpy of formation of water

9 Copper dissolves in dilute nitric acid producing a blue solution of Cu(NO3)2, water and
nitrogen(II) oxide as the only products.

How many moles of acid react with three moles of copper in the balanced equation?

A 2 B 4 C 6 D 8

10 Nitrogen reacts with hydrogen to produce ammonia.

N2(g) + 3H2(g) 2NH3(g)

A mixture of 2.00 mol of nitrogen, 6.00 mol of hydrogen and 2.40 mol of ammonia is allowed to
reach equilibrium in a sealed vessel of volume 1 dm3. It is found that 2.32 mol of nitrogen were
present in the equilibrium mixture.

Which expression will give the value of Kc?

(1.76 )2
A
(2.32)(6.96)3

(1.76)2
B
(2.32)(6.32)3

(2.08 )2
C
(2.32)(6.32)3

(2.40)2
D
(2.32)(6.00)3

© UCLES 2021 9701/13/M/J/21

 5

11 Nitric acid is produced by oxidising ammonia. The first step is to react ammonia with oxygen in
the presence of a catalyst to form nitrogen monoxide.

4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g) H = –1636 kJ mol–1

Which set of conditions will produce the greatest yield of nitrogen monoxide at equilibrium?

temperature pressure

A high high
B high low
C low high
D low low

12 The height of the peak of the curve in a Boltzmann distribution represents the number of
molecules that have the most probable energy.

A sample of gas has its temperature decreased without changing the number of molecules
present.

Which statement correctly describes a feature of the Boltzmann distribution for the gas when the
temperature decreases?

A The value of the most probable energy would stay the same.
B The number of molecules with the most probable energy would increase.
C The area under the molecular energy distribution curve would decrease.
D The number of molecules at the very high energy end of the distribution would stay the
same.

13 Ammonia exists as simple covalent molecules, NH3. Ammonia can react with suitable reagents to
form products containing ammonium ions, NH4+. Ammonia can also react with suitable reagents
to form products containing amide ions, NH2–.

Which of these nitrogen-containing species are present in an aqueous solution of ammonia?

A ammonia molecules and amide ions

B ammonia molecules and ammonium ions
C ammonia molecules only
D ammonium ions only

© UCLES 2021 9701/13/M/J/21 [Turn over

 6

14 Which problem can result if too much NH4NO3 is applied to crops by farmers?

A Not all the NH4NO3 is used by plants and the excess makes the soil alkaline.
B Rain washes some of the NH4NO3 into rivers where it forms a precipitate.
C Some of the NH4NO3 dissolves in groundwater which may eventually be used for drinking.
D Ammonia is produced; this lowers the pH of the soil.

15 When descending Group 17 from chlorine to iodine, which statement is correct?

A The hydrides become less thermally stable as they become weaker reducing agents.
B The hydrides become more thermally stable as the reactivity of the elements decreases.
C The volatility of the elements decreases as the van der Waals’ forces increase.
D The volatility of the elements increases as the size of the molecules increases.

16 A powder is known to be either a single sodium halide or a mixture of two sodium halides.
A sample of the powder was dissolved in water.

Aqueous silver nitrate was added, and a pale yellow precipitate was formed. When concentrated
aqueous ammonia was then added, this precipitate partly dissolved leaving a darker yellow
precipitate.

What could the powder be?

A sodium bromide only

B sodium iodide only
C a mixture of sodium chloride and sodium bromide
D a mixture of sodium chloride and sodium iodide

17 Which statement is correct?

A Doctors can use the very insoluble MgSO4 to investigate the digestive system.
B Farmers can lower the pH of soil by spreading CaCO3 on it.
C Students can test a solution for SO42– ions by using Ba(NO3)2(aq) followed by HNO3(aq).
D The insoluble hydroxide, Ba(OH)2, can be safely used to lower the acidity of the stomach.

© UCLES 2021 9701/13/M/J/21

 7

18 A solid, X, was placed in an excess of the liquid Y.

A colourless gas was given off and a white precipitate was seen. The precipitate was not X.

What could be the identities of X and Y?

X Y

A BaCO3 H2O
B Ca dilute H2SO4
C Mg dilute H2SO4
D SrCO3 dilute HCl

19 Two oxides of Period 3 elements are added separately to water. Both react to form colourless
solutions. One solution is alkaline, the other is acidic.

What could be the two oxides?

A Al 2O3 and SiO2

B Al 2O3 and P4O10
C Na2O and P4O10
D Na2O and SiO2

20 Which compound shows stereoisomerism?

A 2-methylbut-2-ene
B 2-chloropropan-1-ol
C difluorochlorobromomethane
D pent-1-ene

21 Two carbon-containing products result from the reaction of alkene Z with a hot, concentrated,
acidified solution of potassium manganate(VII).

One product forms an orange precipitate with 2,4-dinitrophenylhydrazine reagent. The other
product is a gas which gives a white precipitate with aqueous calcium hydroxide.

Which alkene could be alkene Z?

A but-2-ene
B 2-methylpropene
C 2-methylbut-2-ene
D propene

© UCLES 2021 9701/13/M/J/21 [Turn over

 8

22 What is the correct mechanism for the addition of hydrogen bromide to ethene?

H H H H H H

A C C H C C+ H C C Br
H–
H H Br H H H
Br G
+

HG
–

H H H H H H

B C C H C C+ H C C Br
–
Br
H H H H H H
HG
+

Br G
–

H H H H H H

C C C H C C+ H C C Br
–
H
H H Br H H H
Br G
+

HG
–

H H H H H H

D C C H C C+ H C C Br
Br–
H H H H H H
HG
+

Br G
–

23 Halogenoalkanes react with nucleophiles such as OH–.

Which pair of halogenoalkanes both react via an SN1 mechanism?

A B
Br Cl
and and
Cl
Br

C D
Br
and and
Br Cl Br

© UCLES 2021 9701/13/M/J/21

 9

24 A mixture of ethanol and methanol is burned in oxygen to produce 35 cm3 of CO2 and 55 cm3 of
H2O.

Complete combustion occurs and the volumes of both products are measured at 101 kPa and
120 C.

What is the molar ratio, ethanol : methanol, in the mixture?

A 1:3 B 2:3 C 3:2 D 3:1

25 Two reactions are shown. Only one product is identified in each reaction.

ethanol + acidified Cr2O72–  ethanal

ethanol + sodium  sodium ethoxide

Which statement about these reactions is correct?

A The formations of both ethanal and sodium ethoxide are redox reactions.
B The formations of both ethanal and sodium ethoxide result in colour changes.
C The formation of ethanal is catalysed by potassium dichromate.
D The formation of sodium ethoxide is a dehydration reaction.

26 The skeletal formulae of three compounds are shown.

R S T

OH O

O O O

Which compounds will give a positive test with 2,4-dinitrophenylhydrazine reagent?

A R only B R and S only C S and T only D R, S and T

© UCLES 2021 9701/13/M/J/21 [Turn over

 10

27 The diagram shows the structure of a compound formed by the reaction of HCN with a carbonyl
compound, X.

C 4H 9

H 3C C CN

OH

What is the mechanism of this reaction and what is the functional group in X?

mechanism of reaction functional group in X

A electrophilic addition aldehyde

B electrophilic addition ketone
C nucleophilic addition aldehyde
D nucleophilic addition ketone

28 Compound Y is treated with a single reagent under suitable conditions. 2-methylbutanoic acid is
produced.

What could compound Y be?

A pentan-2-one
B 2-methylbutan-2-ol
C 2-methylbutanenitrile
D methylpropanenitrile

29 Two reactions are shown.

LiAl H4
(CH3)2CHCO2H alcohol P

hydrolysis
CH3CO2CH(CH3)2 alcohol Q + acid R

To which classes of alcohol do P and Q belong?

P Q

A primary primary
B primary secondary
C secondary primary
D secondary secondary

© UCLES 2021 9701/13/M/J/21

 11

30 The infra-red spectrum of molecule Z is shown.

100

transmittance / %
50

0
4000 3000 2000 1500 1000 500
wavenumber / cm–1

What could be the identity of Z?

A B
HO OH
O O
HO O O O

C D

O O
O O O O

© UCLES 2021 9701/13/M/J/21 [Turn over

 12

Section B

For each of the questions in this section, one or more of the three numbered statements 1 to 3 may
be correct.

Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against
the statements that you consider to be correct).

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

Use of the Data Booklet may be appropriate for some questions.

31 Which statements about first ionisation energies are correct?

1 They are always endothermic.

2 They decrease down Group 2.
3 They decrease across Period 3.

32 The equation shows the decomposition of three moles of an ion containing chromium in an acid
solution.

3CrO43–(aq) + 8H+(aq)  2CrO42–(aq) + Cr3+(aq) + 4H2O(l)

Which statements are correct?

1 One mole of CrO43– is reduced.

2 Two moles of CrO43– are oxidised.
3 Three moles of electrons are transferred.

33 Disaccharides are hydrolysed in slightly acidic solutions. This reaction is very slow.

A biological catalyst is added to a slightly acidic mixture of three disaccharides, sucrose, maltose
and lactose. The hydrolysis reaction remains slow for sucrose and maltose but is now much
faster for lactose.

Which statements about the catalyst are correct?

1 The catalyst increases the activation energy of all three hydrolysis reactions.
2 The catalyst shows specificity.
3 The hydrolysis of lactose using a catalyst has a different mechanism to the hydrolysis of
lactose without a catalyst.

© UCLES 2021 9701/13/M/J/21

 13

34 Element X is a solid under room conditions. It occurs as a contaminant of fossil fuels.

Its oxide, Y, is formed when fossil fuels are burned.

In the atmosphere, Y can be further oxidised to Z.

Which statements about X, Y and Z are correct?

1 Atoms of X have paired p electrons.

2 The atmospheric oxidation of Y to Z is a catalysed reaction.
3 With water, Z forms a strong acid.

35 Which reagents produce a solution of sodium chlorate(V)?

1 chlorine and hot concentrated sodium hydroxide solution

2 chlorine and cold dilute sodium hydroxide solution
3 chlorine dissolved in water at room temperature

36 Which statements help to explain the increase in melting point from sodium to aluminium?

1 The charge on the metal ion increases.

2 There are more delocalised electrons per metal ion.
3 The radius of the metal ion decreases.

37 The diagram shows a molecule of a compound used as a flame retardant.

Br
Br

Br

Br Br
Br

Which statements about this structure are correct?

1 Each brominated C atom is chiral.

2 The molecular formula is C12H20Br6.

3 The C–C–C bond angles are all 120.

© UCLES 2021 9701/13/M/J/21 [Turn over

 14

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

38 Bromoethane reacts with NaOH in different ways depending on the solvent used.

Which rows about these reactions are correct?

solvent used organic product

1 water ethan-1,2-diol
2 ethanol ethene
3 water ethanol

39 Three compounds, X, Y and Z, are shown.

X Y Z
C2H5COCH3 C2H5CHO CH3CO2H

Which statements about X, Y and Z are correct?

1 X reacts with alkaline aqueous iodine.

2 Y reacts with Tollens’ reagent.
3 Z does not react with alkaline aqueous iodine.

40 5-hydroxypentanoic acid is readily converted into the cyclic compound L.

Which statements about this reaction are correct?

1 Acidified sodium dichromate(VI) is used as a reagent.

2 A water molecule is produced in the reaction.
3 The reaction can be catalysed by concentrated H2SO4.

© UCLES 2021 9701/13/M/J/21

 Cambridge International AS & A Level

CHEMISTRY 9701/12
Paper 1 Multiple Choice February/March 2021
1 hour

You must answer on the multiple choice answer sheet.

*9283990023*

You will need: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)
Data Booklet

INSTRUCTIONS
 There are forty questions on this paper. Answer all questions.
 For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
 Follow the instructions on the multiple choice answer sheet.
 Write in soft pencil.
 Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
 Do not use correction fluid.
 Do not write on any bar codes.
 You may use a calculator.

INFORMATION
 The total mark for this paper is 40.
 Each correct answer will score one mark.
 Any rough working should be done on this question paper.

This document has 16 pages. Any blank pages are indicated.

IB21 03_9701_12/3RP
© UCLES 2021 [Turn over
 2

Section A

For each question there are four possible answers A, B, C and D. Choose the one you consider to be
correct.

Use of the Data Booklet may be appropriate for some questions.

1 The table shows the numbers of protons, neutrons and electrons in four different particles, W, X,
Y, and Z.

number of number of number of

protons neutrons electrons

W 32 40 32
X 32 40 34
Y 32 42 32
Z 34 40 34

Which pair represents the atoms of two isotopes of the same element?

A W and Y B W and Z C X and Y D X and Z

2 Where in the Periodic Table is the element that has an outer electron shell arrangement of
4s24p3?

Group Period

A 13 3
B 13 4
C 15 3
D 15 4

3 Substance Q is a hydrocarbon. When 1.00 g of Q is completely burned, 3.22 g of carbon dioxide

is produced.

What could be the identity of Q?

A cyclohexene
B cyclopentane
C ethene
D pentane

© UCLES 2021 9701/12/F/M/21

 3

4 Originally, chemists thought indium oxide had the formula InO. By experiment they showed that
4.8 g of indium combined with 1.0 g of oxygen to produce 5.8 g of indium oxide. The Ar of oxygen
was known to be 16.

Which value for the Ar of indium is calculated using these data?

A 38 B 77 C 115 D 154

5 In which substance are the only intermolecular forces temporary dipole-induced dipole
attractions?

A hydrogen chloride
B methanol
C octane
D water

6 A solution contains 0.25 g of sulfur dioxide in 1.00 dm3 of water.

Which volume of sulfur dioxide, measured at 50 C and a pressure of 1  105 Pa, must be added
to 1.00 dm3 of water to produce this solution?

A 0.0162 cm3 B 0.105 cm3 C 16.2 cm3 D 105 cm3

7 An experiment was performed to determine the enthalpy of combustion of ethanol.

thermometer

test-tube

water

spirit burner
ethanol

The data collected are shown.

mass of water = W g
mass of ethanol burned = X g

temperature rise = Y C
molar mass of ethanol = Z g mol–1
specific heat capacity of water = 4.2 J K–1 g–1

Which expression can be used to calculate the enthalpy of combustion of ethanol in kJ mol–1?

4.2WYZ 4.2WYX 4.2 XYZ 4.2 X (Y  273)Z

A B C D
1000 X 1000Z 1000W 1000W

© UCLES 2021 9701/12/F/M/21 [Turn over

 4

8 VO2Cl reacts with NaI under acidic conditions.

2VO2Cl + 2H2SO4 + 2NaI  VOCl 2 + VOSO4 + I2 + Na2SO4 + 2H2O

The oxidation state of Cl is –1 in VO2Cl and in VOCl 2.

Which row about this reaction is correct?

vanadium iodine

A is oxidised is oxidised
B is oxidised is reduced
C is reduced is oxidised
D is reduced is reduced

9 In which reaction is water behaving as a Brønsted–Lowry base?

A H2O + Na  NaOH + 1
2
H2

B H2O + H3PO4  H3O+ + H2PO4–

C H2O + CaO  Ca(OH)2

D NH3 + [Cu(H2O)6]2+  NH4+ + [Cu(H2O)5(OH)]+

10 A large excess of marble chips is reacted with 25 cm3 of 1.0 mol dm–3 hydrochloric acid at 40 C.

How is the result different when the reaction is repeated with 60 cm3 of 0.5 mol dm–3 hydrochloric
acid at 40 C?

A The reaction is faster and more of the products are made when the reaction is complete.
B The reaction is faster and less of the products are made when the reaction is complete.
C The reaction is slower and more of the products are made when the reaction is complete.
D The reaction is slower and less of the products are made when the reaction is complete.

© UCLES 2021 9701/12/F/M/21

 5

11 The Boltzmann distribution curve for a gaseous mixture of ethene and hydrogen is shown. Nickel
is an effective catalyst for the reaction that occurs.

number of
particles with
energy, E Ea (catalysed) Ea

0
0 energy, E

How does the diagram appear if the same reaction mixture is at a higher temperature?

A The curve is unchanged.

B The values of both Ea (catalysed) and Ea decrease.
C The values of both Ea (catalysed) and Ea increase.
D The values of both Ea (catalysed) and Ea remain the same.

12 Which observations are made when a sample of silicon chloride, SiCl 4, is added to a beaker of
water?

A No visible change is observed.

B Steamy fumes and a precipitate are both observed.
C The appearance of a precipitate is the only observation.
D The appearance of steamy fumes is the only observation.

13 Which row is correct?

statement reason
A The first ionisation energy of phosphorus electron is lost from a
is greater than that of magnesium. 3p orbital in both cases
B The melting point of phosphorus phosphorus has more valence
is greater than that of magnesium. electrons than magnesium
C The atomic radius of phosphorus phosphorus has greater nuclear
is smaller than that of magnesium. charge than magnesium
D The electrical conductivity of phosphorus bonding changes from ionic in
is smaller than that of magnesium. magnesium to covalent in phosphorus

© UCLES 2021 9701/12/F/M/21 [Turn over

 6

14 Which row correctly describes one property of barium and one property of barium oxide?

observation when pH of solution obtained when

barium metal is a spatula measure of BaO is
added to water added to 100 cm3 of water

A a few gas bubbles 8

form on the metal surface
B a few gas bubbles 13
form on the metal surface
C rapid effervescence is seen 8
D rapid effervescence is seen 13

15 An anhydrous white salt, Z, is heated strongly for 30 minutes. A mixture of gases is given off. The
solid remaining in the test-tube is then dissolved in a small volume of dilute hydrochloric acid. The
addition of a few drops of dilute sulfuric acid to the test-tube causes a white precipitate to form.

Which substance could be Z?

A barium carbonate
B barium nitrate
C magnesium carbonate
D magnesium nitrate

16 Chlorine gas is reacted with aqueous sodium hydroxide. The oxidation number of chlorine
changes from 0 to –1 and also from 0 to +1.

Under which conditions does this reaction occur and what is the colour of the solid silver salt with
chlorine in the oxidation state –1?

reaction conditions colour of silver salt

A cold, dilute alkali white

B cold, dilute alkali yellow
C hot, concentrated alkali white
D hot, concentrated alkali yellow

© UCLES 2021 9701/12/F/M/21

 7

17 When concentrated sulfuric acid reacts with sodium iodide the products include sulfur, iodine,
hydrogen sulfide and sulfur dioxide.

Which statement is correct?

A Hydrogen sulfide is the product of a reduction reaction.

B Iodide ions are stronger oxidising agents than sulfate ions.
C Sulfur atoms from the sulfuric acid are both oxidised and reduced.
D Sulfur atoms from the sulfuric acid are oxidised to make sulfur dioxide.

18 NO, NO2, CO and unburnt hydrocarbons are present in the exhaust gases of internal combustion
engines. When catalytic converters are used to remove these compounds from the exhaust
gases, redox reactions occur.

What happens to each compound in the catalytic converter?

unburnt
NO NO2 CO
hydrocarbons

A oxidised oxidised reduced oxidised

B oxidised oxidised oxidised oxidised
C reduced reduced oxidised oxidised
D reduced reduced reduced reduced

19 Methylamine, CH3NH2, has similar chemical properties to ammonia, NH3. Methylamine reacts
with hydrogen chloride to form a white crystalline salt, methylammonium chloride.

CH3NH2 + HCl  CH3NH3+Cl –

A sample of methylammonium chloride is heated with aqueous sodium hydroxide.

What are the products?

A ammonia, sodium chloride and water

B ammonia, sodium hydrogencarbonate and sodium chloride
C methylamine, hydrogen chloride and water
D methylamine, sodium chloride and water

© UCLES 2021 9701/12/F/M/21 [Turn over

 8

20 The structures of citric acid and isocitric acid are shown.

citric acid isocitric acid

CH2CO2H CH2CO2H

C(OH)CO2H CHCO2H

CH2CO2H CH(OH)CO2H

How many chiral centres does each acid possess?

citric acid isocitric acid

A 1 1
B 1 2
C 0 1
D 0 2

21 How many tertiary alcohols have the molecular formula C6H14O?

A 1 B 2 C 3 D 4

22 The diagram shows the structure of a bromo compound that may be formed by the reaction of
bromine with a hydrocarbon.

CH2Br

H 3C C CH3

CH2Br

Which row is correct?

type of reaction mechanism

A addition electrophilic
B addition nucleophilic
C substitution nucleophilic
D substitution free-radical

© UCLES 2021 9701/12/F/M/21

 9

23 Part of the structure of strobilurin is shown. R and R' are inert groups.

strobilurin

O OCH3

R'
R

Strobilurin is warmed with aqueous sulfuric acid producing compound X. Compound X is then
treated with hydrogen in the presence of a nickel catalyst producing compound Y.

What could be the structure of compound Y?

A B

O OH HO OCH3

R' R'
R R

C D

OH O OH
OH OH
R' R'
R R
OH

24 Which compound produces a ketone when refluxed with an acidified solution of

potassium dichromate(VI)?

A pentan-1-ol
B 2-methylbutan-1-ol
C 2-methylbutan-2-ol
D 3-methylbutan-2-ol

© UCLES 2021 9701/12/F/M/21 [Turn over

 10

25 Dibromopentanes can undergo ‘double elimination’ reactions to produce hydrocarbons.

2NaOH + C5H10Br2  C5H8 + 2NaBr + 2H2O

Which isomer produces only one hydrocarbon product?

A 1,5-dibromopentane
B 1,4-dibromopentane
C 2,3-dibromopentane
D 2,4-dibromopentane

26 The diagram shows the formation of compound Y from compound X in a chemical reaction. R1
and R2 are alkyl groups.

Y
R1 OH
KCN
X + HCN C
R2 CN

Which row about this reaction is correct?

mechanism compound X

A electrophilic addition aldehyde

B electrophilic addition ketone
C nucleophilic addition ketone
D nucleophilic addition aldehyde

© UCLES 2021 9701/12/F/M/21

 11

27 In this question you can assume that 1H and 3H have the same chemical properties.

A sample of ethanal contains only one isotope of hydrogen, 1H.

It is reduced to compound Z, C2H6O, in a nucleophilic addition reaction using NaBH4. All the
hydrogen atoms in the NaBH4 are the 3H isotope.

NaBH4
CH3CHO C2H6O
compound Z

Compound Z is then oxidised back to ethanal and water.

C2H6O + [O]  CH3CHO + H2O

Which statement about the final mixture of products is correct?

A Both ethanal and water contain 3H atoms.

B Ethanal is the only product containing 3H atoms.
C Neither ethanal nor water contain 3H atoms.
D Water is the only product containing 3H atoms.

28 Ethanedioic acid has the formula HO2CCO2H.

What is the formula of aluminium ethanedioate?

A Al C2O4 B Al (C2O4)3 C Al 2C2O4 D Al 2(C2O4)3

29 Which reaction gives butanoic acid as one of its products?

A acid hydrolysis of butyl ethanoate

B alkaline hydrolysis of butyl ethanoate
C acid hydrolysis of ethyl butanoate
D alkaline hydrolysis of ethyl butanoate

© UCLES 2021 9701/12/F/M/21 [Turn over

 12

30 When reactant X is treated with a suitable reagent, products Y and Z are formed. Infrared spectra
of X, Y and Z are shown.

reactant X
100

transmittance 50

0
4000 3000 2000 1000
–1
wavenumber / cm

product Y product Z
100 100
transmittance

transmittance

50 50

0 0
4000 3000 2000 1000 4000 3000 2000 1500 1000 500
–1 –1
wavenumber / cm wavenumber / cm

Which row could be correct?

X Y Z

A 2,3-dimethylpent-2-ene propanone butanone

B 2-methylpent-2-ene propanone propanoic acid
C pent-2-ene ethanoic acid propanoic acid
D propyl propanoate propan-1-ol propanoic acid

© UCLES 2021 9701/12/F/M/21

 13

Section B

For each of the questions in this section, one or more of the three numbered statements 1 to 3 may
be correct.

Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against
the statements that you consider to be correct).

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

Use of the Data Booklet may be appropriate for some questions.

31 A sample of 17.15 mol HI(g) is in dynamic equilibrium with 2.27 mol H2(g) and 2.84 mol I2(g) in a
volume of 1 m3 at 764 K and 141 kPa.

H2(g) + I2(g) 2HI(g)

Two equilibrium constants, Kc and Kp, can be calculated for this mixture.

Which statements about the equilibrium constants for this mixture are correct?

1 neither Kc nor Kp has any units

2 Kc = 45.6
3 Kc > Kp

32 An energy cycle for the combustion of methane is shown.

∆H co CH4(g)
CH4(g) + 2O2(g) CO2(g) + 2H2O(l)

∆H of CH4(g) ∆H zo

C(s) + 2H2(g) + 2O2(g)

Which expressions can be used to calculate the energy change, ∆H zo ?

1 ∆H of CH4(g) + ∆H co CH4(g)

2 ∆H co C(s) + 2∆H co H2(g)

3 ∆H co CO(g) + 2∆H co H2(g)

© UCLES 2021 9701/12/F/M/21 [Turn over

 14

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

33 Many gases do not obey the general gas equation at high pressures.

Why is this?

1 At higher pressures the molecules have more energy.

2 At higher pressures the volume of the molecules is a larger proportion of the total volume.
3 At higher pressures the molecules experience greater intermolecular forces.

34 Which species can accept a lone pair of electrons to form a coordinate (dative covalent) bond?

1 BF3
2 H+
3 CH3+

35 A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W.

In order to precipitate all of the aluminium as its hydroxide, y mol of sodium hydroxide are
required.

More of the alkali is added to re-dissolve the precipitate, giving solution Z.

Which statements are correct?

1 the initial pH of solution W is below 7

2 y = 3x
3 Z contains x mol of aluminium

36 Nitrogen dioxide gas is produced when petrol is burned in car engines.

Which acids are made in the atmosphere as a result of this release of nitrogen dioxide into the
air?

1 H2SO3
2 H2SO4
3 HNO3

© UCLES 2021 9701/12/F/M/21

 15

37 In which reactions is the major product formed by a nucleophilic substitution reaction?

1 bromoethane + potassium cyanide in ethanol

2 bromoethane + ammonia in ethanol under pressure
3 bromoethane + hot concentrated sodium hydroxide in ethanol

38 An excess of P reacts with Q, in the presence of concentrated sulfuric acid, to form R.

Effervescence is seen when a piece of sodium is added to pure R.

The structure of P is shown.

OH OH

Which organic compounds could be compound Q?

O
1
OH

2 OH

3
O

39 Two carbonyl compounds have the molecular formula C3H6O.

Which reagents give different observations with these two compounds?

1 acidified aqueous potassium manganate(VII)

2 Fehling’s reagent
3 alkaline aqueous iodine

40 An organic compound, T, does not fizz when aqueous sodium carbonate is added to it.

Compound T contains 27.6% by mass of oxygen.

What could be the identity of T?

1 propanal
2 ethyl butanoate
3 3-methylpentanoic acid

© UCLES 2021 9701/12/F/M/21

 16

BLANK PAGE

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.

Cambridge Assessment International Education is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of the University of
Cambridge Local Examinations Syndicate (UCLES), which itself is a department of the University of Cambridge.

© UCLES 2021 9701/12/F/M/21

 Cambridge International AS & A Level

CHEMISTRY 9701/12
Paper 1 Multiple Choice October/November 2020
1 hour

You must answer on the multiple choice answer sheet.

*6828382525*

You will need: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)
Data booklet

INSTRUCTIONS
• There are forty questions on this paper. Answer all questions.
• For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
• Follow the instructions on the multiple choice answer sheet.
• Write in soft pencil.
• Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
• Do not use correction fluid.
• Do not write on any bar codes.
• You may use a calculator.

INFORMATION
• The total mark for this paper is 40.
• Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
• Any rough working should be done on this question paper.

This document has 16 pages. Blank pages are indicated.

IB20 11_9701_12/4RP
© UCLES 2020 [Turn over
 2

Section A

For each question there are four possible answers A, B, C and D. Choose the one you consider to be
correct.

Use of the Data Booklet may be appropriate for some questions.

1 What is the average oxidation number of sulfur in each compound?

Ca(HSO3)2 Na2S2O3

A 4 2
B 4 4
C 6 2
D 6 4

2 An ore of manganese contains 4% by mass of MnO2 and no other manganese compound.

Which mass of manganese would be obtained from 1 tonne of this ore?

A 25.3 kg B 40.0 kg C 63.3 kg D 632 kg

3 Which atomic orbitals are occupied in an atom of phosphorus?

A 1p 2s 2p B 2s 2p 2d C 2s 2p 3s D 2p 3s 3d

4 The structure of compound A is shown.

compound A
CH3 CH3
CH CH C CH C CH CH2OH

CH3 CH3

Some of the carbon atoms in compound A have a tetrahedral arrangement of bonds.

Some of the carbon atoms in compound A have a trigonal planar arrangement of bonds.

How many carbon atoms are there of each type?

tetrahedral trigonal planar

A 5 12
B 8 8
C 9 6
D 9 8

© UCLES 2020 9701/12/O/N/20

 3

5 A white powder is known to be a mixture of magnesium oxide and aluminium oxide.

100 cm3 of 2 mol dm–3 NaOH(aq) is just enough to dissolve the aluminium oxide in x grams of the
mixture.

The reaction is shown.

Al 2O3 + 2OH– + 3H2O → 2Al (OH)4–

800 cm3 of 2 mol dm–3 HCl (aq) is just enough to dissolve all of the oxide in x grams of the mixture.

The reactions are shown.

Al 2O3 + 6H+ → 2Al 3+ + 3H2O

MgO + 2H+ → Mg2+ + H2O

How many moles of each oxide are present in x grams of the mixture?

aluminium magnesium
oxide oxide

A 0.05 0.25
B 0.05 0.50
C 0.10 0.25
D 0.10 0.50

6 A graph of pV against T is shown for a fixed mass of gas. (p = pressure, V = volume and
T = temperature in K.)

pV

Which gas gives this graph over the widest range of temperatures and pressures?

A hydrogen, H2
B hydrogen chloride, HCl
C hydrogen fluoride, HF
D oxygen, O2

© UCLES 2020 9701/12/O/N/20 [Turn over

 4

7 A weather balloon is filled with 12.0 kg helium. The weather balloon reaches a height of 20 km,
the pressure inside the balloon is 6000 Pa and the temperature is 216 K.

What is the volume of the weather balloon at this height, correct to three significant figures?

A 897 dm3 B 1790 dm3 C 897 000 dm3 D 1 790 000 dm3

8 Which pair of enthalpy changes will always share the same sign (i.e. both are always exothermic
or both are always endothermic)?

A enthalpy change of atomisation and enthalpy change of neutralisation

B enthalpy change of atomisation and enthalpy change of solution
C enthalpy change of combustion and enthalpy change of hydration
D enthalpy change of solution and enthalpy change of hydration

9 Chlorine dioxide, Cl O2, reacts with sodium hydroxide in the reaction shown.

2Cl O2 + 2OH– → Cl O2– + Cl O3– + H2O

Which statement correctly describes this redox reaction?

A Chlorine atoms are oxidised and oxygen atoms are reduced.

B Chlorine atoms are reduced and oxygen atoms are oxidised.
C Some chlorine atoms are oxidised and some chlorine atoms are reduced.
D Some oxygen atoms are oxidised and some oxygen atoms are reduced.

10 Sulfur dioxide and oxygen react to form sulfur trioxide. The reaction is reversible.

2SO2(g) + O2(g) 2SO3(g) Kp = 2.96 × 10–9 Pa–1 at 700 °C

The reaction is allowed to reach equilibrium at 700 °C. The partial pressure of O2(g) is 375 kPa
and the partial pressure of SO3(g) is 20.3 kPa.

What is the partial pressure of SO2(g)?

A 19.3 kPa B 609 kPa C 18 300 kPa D 609 000 kPa

© UCLES 2020 9701/12/O/N/20

 5

11 Ammonia is made by the Haber process. The reactants are nitrogen and hydrogen.

N2(g) + 3H2(g) 2NH3(g) ∆H is negative

What will increase the rate of the forward reaction?

A adding argon to the mixture but keeping the total volume constant
B decreasing the temperature
C increasing the total pressure by reducing the total volume at constant temperature
D removing ammonia as it is made but keeping the total volume of the mixture the same

12 Element X, in Period 3, has the following properties.

● Its oxide has a giant structure.

● It forms covalent bonds with chlorine.
● Its oxide will neutralise HCl (aq).

What is element X?

A Mg B Al C Si D P

13 Which row could refer to barium metal and barium hydroxide?

colour seen pH of a saturated

when the metal solution of
is burnt in O2 the hydroxide

A green flame 8
B green flame 13
C white flame 8
D white flame 13

© UCLES 2020 9701/12/O/N/20 [Turn over

 6

14 AgNO3(aq) is added to a solution of a halide ion, X–(aq), and aqueous ammonia is then added.

The ionic equations for the two reactions that occur are shown.

Ag+(aq) + X–(aq) AgX(s) equilibrium 1

Ag+(aq) + 2NH3(aq) Ag(NH3)2+(aq) equilibrium 2

Which statement is correct?

A The position of equilibrium 1 lies to the left when X– = I–.

B Increasing the concentration of ammonia causes the position of equilibrium 1 to move to the
left.

C Kc for equilibrium 2 is larger when X– = Cl – than when X– = I–.

D Equilibrium 2 is a redox reaction.

15 Water and ammonia take part in a reaction that produces the ammonium ion.

Which statement about this reaction is correct?

A The ammonia molecule and the ammonium ion do not have dipole moments.

B The bond angle changes from 109.5° in the ammonia molecule to 107° in the ammonium ion.
C The reaction is a redox reaction.
D The water is acting as an acid.

16 Due to their similar ionic radii, the reactions of lithium and magnesium and their corresponding
compounds are very similar.

Which statement about the reactions of lithium or its compounds can be predicted from this
statement?

A Lithium burns very slowly in oxygen.

B Lithium carbonate decomposes on heating in a blue Bunsen burner flame, forming lithium
oxide and carbon dioxide.
C Lithium nitrate decomposes on heating, forming lithium nitrite, LiNO2, and oxygen.
D Lithium reacts very violently with cold water, producing hydrogen.

17 Which statement about Group 17 elements and their compounds is correct?

A Chlorine reacts with cold concentrated sodium hydroxide to form NaCl and NaCl O3.
B HCl is more thermally stable than HBr because chlorine is less electronegative than bromine.
C Iodide ions are oxidised to iodine by concentrated sulfuric acid.
D Silver iodide is soluble in dilute aqueous ammonia.

© UCLES 2020 9701/12/O/N/20

 7

18 Which substance, when warmed with aqueous ammonium chloride, would produce an alkaline
gas?

A CH3CO2H B CH3CH2OH C CH3CO2CH3 D CH3CH2ONa

19 Compound X is the oxide of a Period 3 element. Compound X reacts with water to give an acidic
solution.

A solution is prepared by reacting 0.100 g of compound X with an excess of water. This solution is
neutralised by exactly 25.0 cm3 of 0.100 mol dm–3 sodium hydroxide solution.

What could be the identity of compound X?

A Al 2O3 B MgO C P4O10 D SO3

20 The unsaturated hydrocarbon octa-1,3,5,7-tetraene, C8H10, can display geometric isomerism.

octa-1,3,5,7-tetraene
CH2=CHCH=CHCH=CHCH=CH2

How many isomers exist?

A 2 B 3 C 4 D 8

21 What is the correct name for the compound shown?

HO

A 1,2,2-trimethylbutan-3-ol
B 2-ethyl-2-methylbutan-2-ol
C 3,3-dimethylpentan-2-ol
D 4-hydroxy-3,3-dimethylpentane

22 A polymer has the following repeat unit. It is made from two different monomers.

CH2 CHCl CH2 CH CH CH2

Which pair of monomers could be used to make this polymer?

A CH2=CHCl and CH2=CH2

B CH2=CHCl and CH2=CH–CH=CH2
C CH3–CH2Cl and CH3–CH=CH–CH3

D CH3–CH=CH–CH3 and CH2=CHCl

© UCLES 2020 9701/12/O/N/20 [Turn over

 8

23 Compound X contains two functional groups.

compound X
O

CH3 C CHO

Which reagent will react with only one of the functional groups?

A acidified potassium dichromate(VI)

B 2,4-DNPH reagent
C hydrogen cyanide
D NaBH4

24 Ethanol can be converted into ethene in a single reaction.

Ethanol can be converted into bromoethane in a single reaction.

Under standard laboratory conditions, is a catalyst used in these reactions?

ethanol to ethene ethanol to bromoethane

A yes yes
B yes no
C no yes
D no no

25 Diols in which both hydroxy groups are bonded to the same carbon atom can spontaneously
eliminate a molecule of water to produce a carbonyl compound.

Which compound, after complete hydrolysis, gives a silver mirror with Tollens’ reagent?

A 1,1-dibromobutane
B 1,2-dibromobutane
C 1,3-dibromobutane
D 2,2-dibromobutane

26 Which alcohol will give a yellow precipitate when warmed with alkaline aqueous iodine?

A (CH3)2CHCH2OH
B (CH3)3COH
C CH3CH2C(OH)(CH3)2
D CH3CH(OH)CH2CH3

© UCLES 2020 9701/12/O/N/20

 9

27 How many structural isomers are there of molecular formula C5H10O that give a red precipitate
with Fehling’s solution?

A 1 B 2 C 3 D 4

28 Which statement about the use of alkane fuels in internal combustion engines is correct?

A C8H18 is used as fuel in internal combustion engines and reacts with oxygen and nitrogen
from the air.
B In limited oxygen, CO is produced which oxidises SO2 to SO3 in the atmosphere.
C The catalytic converter removes polluting gases including NO2 and CO2.
D Unburnt hydrocarbons and NO2 can react in sunlight to produce photochemical smog.

29 Compound Z is shown.

compound Z

HO CO2H

HO O
OH

What is produced in good yield when compound Z is treated with an excess of sodium carbonate
solution at room temperature?

A B

HO CO2Na NaO CO2Na

O O

HO O NaO O
OH ONa

C D

NaO CO2H HO CO2Na

O O
+

NaO O HO OH HO
ONa OH

© UCLES 2020 9701/12/O/N/20 [Turn over

 10

30 The infra-red spectrum shown was obtained from compound G.

100

transmittance
/% 50

0
4000 3000 2000 1500 1000 500
–1
wavenumber / cm

What could be compound G?

A CH3COCH2OH
B CH3CH2CO2H
C CH3CO2CH3
D CH3CHCHCH3

© UCLES 2020 9701/12/O/N/20

 11

Section B

For each of the questions in this section, one or more of the three numbered statements 1 to 3 may
be correct.

Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against
the statements that you consider to be correct).

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

Use of the Data Booklet may be appropriate for some questions.

33 3 −
31 The symbol for a phosphorus ion is 15 P .

37 +
The symbol for a potassium ion is 19 K .

What do these two ions have in common?

1 the same number of electrons

2 the same number of neutrons
3 the same number of protons

32 The repeat unit of a polymer is shown.

H CN

C C

H CO2C2H5 n

Which types of intermolecular forces exist in the solid polymer?

1 temporary dipole – induced dipole interactions

2 permanent dipole – permanent dipole interactions
3 hydrogen bonds

© UCLES 2020 9701/12/O/N/20 [Turn over

 12

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

33 The diagram illustrates the enthalpy changes of a set of reactions.

∆H = –134 kJ mol–1
R S

∆H = +92 kJ mol–1

∆H = –75 kJ mol–1
T U

Which statements are correct?

1 The enthalpy change for the transformation U → R is + 42 kJ mol–1.

2 The enthalpy change for the transformation T → S is endothermic.

3 The enthalpy change for the transformation R → T is – 33 kJ mol–1.

34 Which statements about a reaction that has reached dynamic equilibrium are correct?

1 The rate of the forward reaction equals the rate of the reverse reaction.
2 There is no overall change in the concentrations of reactants and products.
3 There is no change in the measurable properties of the system.

35 Group 2 elements and their compounds show trends in their physical and chemical properties.
Barium is above radium in Group 2 of the Periodic Table.

Which statements are likely to be correct?

1 Barium hydroxide is less soluble than radium hydroxide.

2 Barium reacts less vigorously with water than radium does.
3 Barium sulfate is more soluble than radium sulfate.

© UCLES 2020 9701/12/O/N/20

 13

36 Which statements are correct?

1 The empirical formula of silicon(IV) oxide is SiO2.

2 The molecular formula of phosphorus(V) oxide is P2O5.

3 Silicon(IV) oxide and phosphorus(V) oxide are both simple molecular compounds.

37 Which reagents could be used, under suitable conditions, to oxidise CH3CH2CH2OH to

CH3CH2CHO?

1 acidified potassium manganate(VII)

2 acidified potassium dichromate(VI)

3 Tollens’ reagent

38 Which free radicals can be generated during a free-radical substitution reaction between chlorine
and ethane?

1 CH3•
2 CH2Cl CH2•
3 CH3CCl 2•

39 Which substances have molecular formula C4H8O?

1
O

2
O

OH
3

40 Which reactions produce pentanoic acid?

1 CH3CH2CH2CH(OH)CH3 + H+ / MnO4–(aq)
2 CH3OCO(CH2)3CH3 + HCl (aq)
3 CH3(CH2)3CN + H2SO4(aq)

© UCLES 2020 9701/12/O/N/20

 14

BLANK PAGE

© UCLES 2020 9701/12/O/N/20

 Cambridge International AS & A Level

CHEMISTRY 9701/13
Paper 1 Multiple Choice May/June 2020
1 hour

You must answer on the multiple choice answer sheet.

*2049510730*

You will need: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)
Data booklet

INSTRUCTIONS
• There are forty questions on this paper. Answer all questions.
• For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
• Follow the instructions on the multiple choice answer sheet.
• Write in soft pencil.
• Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
• Do not use correction fluid.
• Do not write on any bar codes.
• You may use a calculator.

INFORMATION
• The total mark for this paper is 40.
• Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
• Any rough working should be done on this question paper.

This document has 16 pages. Blank pages are indicated.

IB20 06_9701_13/3RP
© UCLES 2020 [Turn over
 2

Section A

For each question there are four possible answers A, B, C and D. Choose the one you consider to be
correct.

Use of the Data Booklet may be appropriate for some questions.

1 Which particle has equal numbers of protons and neutrons and an electronic structure of
1s22s22p63s23p6?
39 40 2+ 16 2 − 32
A 18 Ar B 20 Ca C 8O D 16 S

2 Which molecule contains six bonding electrons?

A NCl 3 B H2S C C2H4 D SF6

3 Solid carbon dioxide, CO2, is similar to solid iodine, I2, in its structure.

Which statement about solid CO2 and solid SiO2 is correct?

A Both solid CO2 and solid SiO2 exist in a lattice structure.

B Both solid CO2 and solid SiO2 have a simple molecular structure.
C Both solid CO2 and solid SiO2 have atoms joined by single covalent bonds.
D Both solid CO2 and solid SiO2 change spontaneously to gas at s.t.p..

4 The enthalpy changes of two reactions are shown.

K2CO3(s) + 2HCl (aq) → 2KCl (aq) + H2O(l) + CO2(g) ∆H = –34.0 kJ mol–1

KHCO3(s) + HCl (aq) → KCl (aq) + H2O(l) + CO2(g) ∆H = +32.8 kJ mol–1

What is the enthalpy change for the reaction shown?

2KHCO3(s) → K2CO3(s) + H2O(l) + CO2(g)

A –31.6 kJ mol–1
B 1.2 kJ mol–1
C 66.8 kJ mol–1
D 99.6 kJ mol–1

© UCLES 2020 9701/13/M/J/20

 3

5 Nitrogen reacts with oxygen to form nitrogen monoxide, NO, and nitrogen dioxide, NO2. Nitrogen
dioxide reacts with water and with hydroxide ions.

N2(g) + O2(g) → 2NO(g)

2NO(g) + O2(g) → 2NO2(g)

2NO2(g) + H2O(l) → HNO2(aq) + H+(aq) + NO3–(aq)

2NO2(g) + 2OH–(aq) → NO2–(aq) + NO3–(aq) + H2O(l)

What can be deduced using only the information from these equations?

A HNO2 is a strong acid.

B HNO3 is a weak acid.
C NO2 is a neutral gas.
D NO is a reducing agent.

6 Which solution has the lowest pH value?

A 0.01 mol dm–3 butanoic acid

B 0.01 mol dm–3 ethanoic acid
C 0.01 mol dm–3 hydrochloric acid
D 0.01 mol dm–3 sulfuric acid

7 The element sulfur produces a mass spectrum with the following peaks.

m / e value relative
of peak abundance

32 95.02
33 0.76
34 4.20
36 0.02

Which relative atomic mass of sulfur can be calculated from these data, given to four significant
figures?

A 32.07 B 32.08 C 32.09 D 32.10

© UCLES 2020 9701/13/M/J/20 [Turn over

 4

8 What is the electronic configuration of an isolated Ni2+ ion?

A 1s22s22p63s23p63d64s2
B 1s22s22p63s23p63d74s1
C 1s22s22p63s23p63d104s2
D 1s22s22p63s23p63d8

9 At 200 °C aluminium chloride is a gas with Mr = 267.

What is the number of covalent bonds, dative covalent bonds and Ione pairs of electrons in one
molecule of aluminium chloride at 200 °C?

covalent dative
Ione pairs
bonds covalent bonds

A 6 2 0
B 6 2 16
C 6 2 18
D 3 0 9

10 When solid KCl O3 is heated in the absence of air, a mixture of two chlorine compounds in the
mole ratio of 3 : 1 is formed. Chlorine is the only element whose oxidation number changes in this
reaction.

What could be the oxidation numbers of chlorine in the two compounds that are formed?

A +3 and –1 B +6 and +4 C +7 and –1 D +7 and +1

11 Two reactions are shown.

reaction 1 X2(g) + Y2(g) 2XY(g)

1 1
reaction 2 XY(g) 2
X2(g) + 2
Y2(g)

The equilibrium constant, Kp, for reaction 1 is 0.0052.

What is Kp for reaction 2?

A 2.6 × 10–3 B 13.9 C 192.3 D 384.6

© UCLES 2020 9701/13/M/J/20

 5

12 Compound T is a white crystalline solid.

When a sample of compound T is mixed with aqueous sodium hydroxide and heated, a gas is
produced which turns damp red litmus paper blue.

Further testing of a solution of compound T with aqueous barium chloride produces a dense
white precipitate which does not dissolve when dilute hydrochloric acid is added to the mixture.

What is the identity of compound T?

A ammonium carbonate
B ammonium sulfate
C sodium carbonate
D sodium sulfate

13 Which property explains the trend in volatility of the elements going down Group 17?

A decreasing covalent bond strength

B decreasing van der Waals’ forces
C increasing covalent bond strength
D increasing van der Waals’ forces

14 The statements apply to the elements in Group 2.

Which statement is correct?

A As atomic number increases, ionic radius increases.

B As atomic number increases, reducing ability decreases.
C As atomic number increases, first ionisation energy increases.
D As atomic radius increases, first ionisation energy increases.

15 Which element, when burned in oxygen, can form an oxide that is a reducing agent?

A Na B Mg C Al D S

© UCLES 2020 9701/13/M/J/20 [Turn over

 6

16 Nitrogen oxides are removed from the exhaust gases of internal combustion engines by the
action of a catalyst in a catalytic converter.

Which row is correct?

change in oxidation
type of catalyst
number of nitrogen

A decrease heterogeneous
B decrease homogeneous
C increase heterogeneous
D increase homogeneous

17 The addition of aqueous silver nitrate to aqueous barium chloride produces a white precipitate
which dissolves in an excess of dilute aqueous ammonia to form a colourless solution.

The addition of an excess of dilute nitric acid to the colourless solution produces a white
precipitate, Z.

What is Z?

A AgCl B BaCl 2 C Ba(NO3)2 D NH4NO3

18 Which property shows an increase from calcium to barium going down Group 2?

A the ease of decomposition of the carbonates

B the solubility of the hydroxides
C the solubility of the sulfates
D the volume of hydrogen given off when 1 g of the metal reacts with water

19 Element X is in Period 3. It reacts rapidly with water to form an alkaline solution.

Which statement about the chloride of element X is correct?

A It conducts electricity when molten.

B It has a melting point of less than 100 °C.

C It has covalent bonding.
D It reacts rapidly with cold water.

20 Structural and stereoisomerism should be considered when answering this question.

When trans-pent-2-ene reacts with HBr, how many different products can form?

A 1 B 2 C 3 D 4

© UCLES 2020 9701/13/M/J/20

 7

21 Ester P has the following structural formula.

ester P
O

CH3C

OCH2CH2CH(CH3)2

Which compounds are produced when P is hydrolysed using dilute hydrochloric acid?

A CH3COCl and (CH3)2CHCH2CH2OH

B CH3CH2OH and (CH3)2CHCH2CO2H
C CH3CO2H and (CH3)2CHCH2CO2H
D CH3CO2H and (CH3)2CHCH2CH2OH

22 There are many non-cyclic alcohols that cannot be oxidised by warm acidified MnO4– ions.
Alcohol X is the member of this set of alcohols with the lowest molecular mass.

How many moles of oxygen are required for the complete combustion of 1.0 mol of alcohol X?

A 3.5 mol B 4.5 mol C 6.0 mol D 6.5 mol

23 Butanoic acid can be produced from 1-bromopropane in two steps using reagents V and W as
shown.

reagent V reagent W
1-bromopropane compound Q butanoic acid

What could be reagents V and W?

V W

A KCN in ethanol HCl (aq)

B KCN in ethanol NaOH(aq)
C NH3 in ethanol HCl (aq)
D NaOH(aq) H+ / Cr2O72–(aq)

© UCLES 2020 9701/13/M/J/20 [Turn over

 8

24 Which statement about compound T and compound U is correct?

compound T compound U
O O

H 3C C H C

CH2CH2CH3 CH(CH3)CH2CH3

A T and U are stereoisomers.

B T can be distinguished from U by the use of alkaline aqueous iodine.
C T can be reduced by LiAl H4 but not by NaBH4.
D U can be formed by the oxidation of 3-methylbutan-1-ol.

25 The diagram shows the infrared spectrum of an organic compound.

What could be the identity of this compound?

A propan-1-ol
B propanal
C propanoic acid
D propanone

26 Which reagent reacts with both of the –OH groups in lactic acid, CH3CH(OH)CO2H?

A acidified potassium dichromate(VI)

B ethanol
C sodium
D sodium hydroxide

© UCLES 2020 9701/13/M/J/20

 9

27 1,2-dibromopropane can be made from 1-bromopropane in two steps.

Which row is correct?

step 1 step 2

A addition substitution
B elimination addition
C hydrolysis elimination
D substitution hydrolysis

28 2-methylbut-2-ene reacts with HBr(g) to form two isomeric products. During the reaction two
positively charged intermediates can be made.

Which diagram shows the more stable of the two positively charged intermediates?

A B C D
Br
+ Br +
+
+

29 The ester ethyl methanoate is prepared in a school laboratory by reacting a carboxylic acid with
an alcohol.

During the reaction, only 50.0% of the alcohol is converted into the ester.

Which mass of alcohol is needed to prepare 10.0 g of the ester?

A 3.11 g B 8.65 g C 12.4 g D 32.2 g

© UCLES 2020 9701/13/M/J/20 [Turn over

 10

30 Compound X has the structure shown.

compound X
O

Which type of carbonyl group is present and how many chiral centres are there in one molecule
of X?

carbonyl chiral
group centres

A aldehyde 0
B aldehyde 1
C ketone 0
D ketone 1

© UCLES 2020 9701/13/M/J/20

 11

Section B

For each of the questions in this section, one or more of the three numbered statements 1 to 3 may
be correct.

Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against
the statements that you consider to be correct).

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

Use of the Data Booklet may be appropriate for some questions.

31 Which contain one mole of the underlined substance under room conditions?

1 a balloon containing 24.0 dm3 of helium

2 a block of calcium carbonate weighing 100.1 g
3 4000 cm3 of a 0.250 mol dm–3 solution of sulfuric acid

32 Buckminsterfullerene is a fullerene allotrope of carbon.

Which statements about buckminsterfullerene are correct?

1 Buckminsterfullerene is a giant covalent molecule.

2 Buckminsterfullerene has delocalised electrons.
3 Buckminsterfullerene has strong intramolecular bonds.

33 Gaseous sodium ions can be formed from sodium atoms.

Na(s) → Na+(g)

Which quantities are required to calculate the enthalpy change of formation of Na+(g)?

1 first ionisation energy of sodium

2 enthalpy change of atomisation of sodium
3 enthalpy change of formation of sodium

© UCLES 2020 9701/13/M/J/20 [Turn over

 12

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

34 The Haber process is used in industry to form ammonia from hydrogen and nitrogen.

3H2 + N2 2NH3

Which statements about the activation energy for this process are correct?

1 The activation energy for the forward reaction is the same as the activation energy for the
reverse reaction.
2 The activation energy for the reverse reaction is decreased by the addition of iron.
3 The activation energy is the minimum energy that colliding particles must possess in order to
react.

35 Strontium nitrate is heated strongly for several minutes.

Which statements are correct?

1 A brown gas is produced.

2 A gas is produced that relights a glowing splint.
3 A white powder remains after heating.

36 When added to water, which oxides will not cause a change in pH?

1 Al 2O3
2 SiO2
3 P4O10

© UCLES 2020 9701/13/M/J/20

 13

37 Propanal reacts with hydrogen cyanide to form 2-hydroxybutanenitrile. A suitable catalyst for this
reaction is sodium cyanide.

NaCN
CH3CH2CHO + HCN CH3CH2CH(OH)CN

Which statements about this catalysed reaction of propanal with hydrogen cyanide are correct?

1 The sodium cyanide provides a stronger nucleophile than HCN.

2 The reaction can be classified as nucleophilic substitution.
3 The hydrogen cyanide molecule attacks the propanal molecule to form an intermediate ion.

38 A reaction mechanism is shown.

CH2 CH2

H2C CH2 H 2C CH2

+ Cl –

H 2C C Cl H 2C C H

H OH
HO–

Which statements about this reaction are correct?

1 It is a substitution reaction.
2 OH– behaves as a nucleophile.
3 Heterolytic bond fission is involved.

39 On complete combustion, a sample of X produces 44 g of carbon dioxide and 27 g of water.

On complete combustion, a sample of Y produces 44 g of carbon dioxide and 18 g of water.

On complete combustion, a sample of Z produces 22 g of carbon dioxide and 9 g of water.

Which substances could be straight chain alkanes?

1 X
2 Y
3 Z

© UCLES 2020 9701/13/M/J/20 [Turn over

 14

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

40 Which pairs are structural isomers of each other?

1 CH3CH2CH2CH2CH2CO2H and CH3CH2CH2CO2CH2CH3

2 and

3 CH3CH2CH2CH(OH)CH2CH3 and CH3CH2CH(OH)CH2CH2CH3

© UCLES 2020 9701/13/M/J/20

 15

BLANK PAGE

© UCLES 2020 9701/13/M/J/20

 16

BLANK PAGE

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.

To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.

Cambridge Assessment International Education is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of the University of
Cambridge Local Examinations Syndicate (UCLES), which itself is a department of the University of Cambridge.

© UCLES 2020 9701/13/M/J/20

 Cambridge International AS & A Level

CHEMISTRY 9701/12
Paper 1 Multiple Choice February/March 2020
1 hour

You must answer on the multiple choice answer sheet.

*4974833897*

You will need: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)
Data booklet

INSTRUCTIONS
• There are forty questions on this paper. Answer all questions.
• For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
• Follow the instructions on the multiple choice answer sheet.
• Write in soft pencil.
• Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
• Do not use correction fluid.
• Do not write on any bar codes.
• You may use a calculator.

INFORMATION
• The total mark for this paper is 40.
• Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
• Any rough working should be done on this question paper.

This document has 16 pages. Blank pages are indicated.

IB20 03_9701_12/3RP
© UCLES 2020 [Turn over
 2

Section A

For each question there are four possible answers A, B, C and D. Choose the one you consider to be
correct.

Use of the Data Booklet may be appropriate for some questions.

1 What number of protons, neutrons and electrons are present in the ion 54Fe3+?

protons neutrons electrons

A 26 28 23
B 26 28 29
C 29 25 23
D 29 25 26

2 For which hydrocarbon are the molecular and empirical formulae the same?

A butane
B ethane
C pent-1-ene
D propane

3 Which molecule does not have any 90° or 180° bond angles?

A C2H6 B CO2 C PF5 D SF6

4 The following data are needed for this question.

NaHCO3(s) + HCl (aq) → NaCl (aq) + H2O(l) + CO2(g) ∆H = –38.97 kJ mol–1

Na2CO3(s) + 2HCl (aq) → 2NaCl (aq) + H2O(l) + CO2(g) ∆H = –96.59 kJ mol–1

On heating, sodium hydrogencarbonate decomposes as shown.

2NaHCO3(s) → Na2CO3(s) + H2O(l) + CO2(g)

What is the enthalpy change for this decomposition?

A –57.62 kJ mol–1
B –18.65 kJ mol–1
C 18.65 kJ mol–1
D 57.62 kJ mol–1

© UCLES 2020 9701/12/F/M/20

 3

5 In the redox reaction shown, how do the oxidation states of vanadium and sulfur change?

VO2+ + SO2 → V3+ + SO42–

vanadium sulfur
from to from to

A +1 +3 0 –2
B +1 +3 +4 +6
C +5 +3 0 –2
D +5 +3 +4 +6

6 The equation for the reaction between silver chloride and aqueous ammonia is shown.

AgCl (s) + 2NH3(aq) [Ag(NH3)2]+(aq) + Cl –(aq)

What are the units of Kc for this reaction?

A no units B mol–1 dm3 C mol dm–3 D mol2 dm–6

7 Sodium azide, NaN3, decomposes as shown.

2NaN3 → 2Na + 3N2

Which volume of nitrogen, measured at room temperature and pressure, will be produced by the
decomposition of 150 g of sodium azide?

A 166 dm3 B 83 dm3 C 55 dm3 D 37 dm3

8 A stable ion N5+ has been produced by research chemists.

Which structure is most likely to show the electron arrangement of this ion?

+
A N N N N N

+
B N N N N N

+
C N N N N N

+
D N N N N N

© UCLES 2020 9701/12/F/M/20 [Turn over

 4

9 1.8 g of water, heated to 227 °C in a sealed container, turns to steam with a pressure of 200 kPa.

What is the approximate volume of the container?

A 9 × 10–4 m3 B 2 × 10–3 m3 C 2 m3 D 8 × 107 m3

10 When the equation is correctly balanced, what is the value of c?

aC2H4 + bH2O + cH+ + 2MnO4– → dC2H6O2 + eMn2+

A 3 B 4 C 5 D 6

11 The main stage in the Contact process is an equilibrium reaction.

2SO2 + O2 2SO3

Which row describes the effect of the named condition on the equilibrium yield?

presence of catalyst high pressure high temperature

A no effect on yield decreases yield increases yield

B no effect on yield increases yield decreases yield
C increases yield decreases yield increases yield
D increases yield increases yield decreases yield

12 X and Y are oxides of different Period 3 elements.

If one mole of X is added to water, the solution formed is neutralised by exactly one mole of Y.

What could be the identities of X and Y?

X Y

A P4O10 Al 2O3
B SO3 Al 2O3
C P4O10 Na2O
D SO3 Na2O

© UCLES 2020 9701/12/F/M/20

 5

13 Compound Z is insoluble in water but soluble at low pH.

What could be compound Z?

A barium carbonate
B barium chloride
C barium hydroxide
D barium sulfate

14 Hot aqueous sodium hydroxide reacts with chlorine.

6NaOH(aq) + 3Cl 2(g) → 5NaCl (aq) + NaCl O3(aq) + 3H2O(I)

Which statement is correct?

A The oxidation numbers of chlorine and hydrogen both change in the reaction.
B The oxidation numbers of chlorine in the products are –1 and +1.
C If the aqueous sodium hydroxide is cold the reaction produces NaCl O instead of NaCl O3.
D Sodium undergoes disproportionation in this reaction.

15 Solid ammonium nitrate is put into a test-tube and solution X is added to it. The resulting mixture
is warmed and the gas given off is tested with damp red litmus paper. The litmus paper changes
colour from red to blue.

What could be the identity of X and its role in the reaction?

identity of X role of X

A NaOH(aq) proton donor

B NaOH(aq) proton acceptor
C HCl (aq) proton donor
D HCl (aq) proton acceptor

16 Sodium, magnesium and aluminium are three elements in Period 3 of the Periodic Table. Each
element forms an oxide.

Which row is correct?

sodium oxide magnesium oxide aluminium oxide

A basic amphoteric amphoteric

B giant ionic giant ionic simple molecular
C high melting point high melting point low melting point
D readily reacts with water slight reaction with water no reaction with water

© UCLES 2020 9701/12/F/M/20 [Turn over

 6

17 A student investigates calcium nitrate crystals by heating them in the apparatus shown.

A colourless gas leaves the apparatus at Y. A flame is held to this gas.

lighted splint

Y
calcium nitrate
crystals
heat
water with a
few drops of litmus

Which observations would the student make?

litmus solution flame at Y

A changes to blue flame burns more brightly

B changes to blue flame goes out
C changes to red flame burns more brightly
D changes to red flame goes out

18 How does concentrated sulfuric acid behave when it reacts with sodium chloride?

A as an acid only
B as an acid and oxidising agent
C as an oxidising agent only
D as a reducing agent only

19 Which statement about nitrogen or its compounds is correct?

A In the Haber process the temperature is kept high to give a good equilibrium yield of
ammonia.
B Nitrogen gas is unreactive because of the strong nitrogen–nitrogen double bond.
C Nitrogen monoxide will react with carbon monoxide under suitable conditions.
D The formula of ammonium sulfate is NH4SO4.

20 Which pair of compounds are functional group isomers of each other?

A butan-1-ol and butanal

B ethylpropanoate and pentanoic acid
C hex-1-ene and hex-2-ene
D propylamine and propanenitrile

© UCLES 2020 9701/12/F/M/20

 7

21 Which row identifies a suitable starting material and reagent that can be used to produce
butanenitrile?

starting material reagent

A CH3CH2CH2Br HCN
B CH3CH2CH2Br NaCN
C CH3CH2CH2CH2Br HCN
D CH3CH2CH2CH2Br NaCN

22 The diagram shows the structure of ethanedioic acid.

HO OH

C C

O O

Ethanedioic acid reacts with ethanol in the presence of a few drops of concentrated sulfuric acid
to form a diester. The molecular formula of the diester is C6H10O4.

What is the structural formula of the diester?

A CH3CH2CO2CO2CH2CH3
B CH3CH2OCOCO2CH2CH3
C CH3CH2O2CO2CCH2CH3
D CH3CO2CH2CH2OCOCH3

© UCLES 2020 9701/12/F/M/20 [Turn over

 8

23 The infrared spectrum shown was obtained from a compound J.

100

transmittance
50

0
4000 3000 2000 1500 1000 500
wavenumber / cm–1

Which statement about J is correct?

A Both C=O and C≡N are present.

B Neither C=O nor C≡N are present.
C C=O is present but not C≡N.
D C≡N is present but not C=O.

24 A section of a polymer chain is shown.

What is the correct monomer?

A B C D

25 Structural isomerism and stereoisomerism should be considered when answering this question.

How many non-cyclic isomers have the molecular formula C5H10?

A 3 B 4 C 5 D 6

© UCLES 2020 9701/12/F/M/20

 9

26 An excess of dry HBr is warmed with compound Y.

Y
OH

What is the major product of the reaction?

A B C D
Br

HO HO Br
Br Br Br
Br

Br Br
Br

27 Which reaction would produce propanoic acid as one of its products?

A heating (CH3)2C=CHCH2CH3 with concentrated, acidified KMnO4

B heating CH3CH2CO2CH2CH2CH3 with NaOH(aq)
C heating CH3CH2OH with acidified K2Cr2O7 under reflux
D reacting CH3CHO with HCN then heating the organic product with H2SO4(aq)

© UCLES 2020 9701/12/F/M/20 [Turn over

 10

28 Compound X is treated with an excess of lithium aluminium hydride. The reaction is allowed to go
to completion.

X
O
O

OH

What is the structure of the organic product?

A B
O O
O

H OH

C D
HO HO
O

OH OH

29 What is the skeletal formula of the compound formed when CH3CH=CHCH2OH is heated, under
reflux, with K2Cr2O7 / H+?

A B C D

O O OH O OH O

OH OH

OH OH

© UCLES 2020 9701/12/F/M/20

 11

30 The diagram shows the structure of compound Q.

O X
HO
Y

O
O

Two of the rings, X and Y, contain a C=C bond.

Which row is correct?

number of ester groups description of

in one molecule of Q rings X and Y

A 1 both are planar

B 1 neither is planar
C 2 both are planar
D 2 neither is planar

© UCLES 2020 9701/12/F/M/20 [Turn over

 12

Section B

For each of the questions in this section, one or more of the three numbered statements 1 to 3 may
be correct.

Decide whether each of the statements is or is not correct (you may find it helpful to put a tick against
the statements that you consider to be correct).

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

Use of the Data Booklet may be appropriate for some questions.

31 Carbon and nitrogen are adjacent in the Periodic Table.

Which properties do they both have?

1 There is an empty 2p orbital in each atom of the element.

2 The principal quantum number of the highest occupied orbital is 2.
3 They can form compounds in which their atoms form four bonds.

32 The strong hydrogen bonding present in liquid water causes an increase in which properties?

1 viscosity
2 boiling point
3 surface tension

33 A reaction between carbon and oxygen is shown.

C(s) + 1
2
O2 (g) → CO(g)

How can the standard enthalpy change of this reaction be described correctly?

1 standard enthalpy change of formation

2 standard enthalpy change of combustion
3 standard enthalpy change of atomisation

© UCLES 2020 9701/12/F/M/20

 13

34 Hydrochloric acid reacts with zinc.

2HCl (aq) + Zn(s) → ZnCl 2(aq) + H2(g)

What will increase the rate of this reaction but will not change the Boltzmann distribution of
molecular energies?

1 addition of a suitable catalyst

2 an increase in concentration of hydrochloric acid
3 an increase in temperature of hydrochloric acid

35 The element astatine, At, is below iodine in Group 17 of the Periodic Table.

Which statements concerning At are likely to be correct?

1 It is a dark-coloured solid at room temperature.

2 It is a more powerful oxidising agent than iodine.
3 Its hydride is more thermally stable than HBr.

36 Which statements are correct?

1 Aluminium chloride dissolves in water to give an acidic solution.

2 Magnesium chloride dissolves in water to give a solution of pH close to 7.
3 Sodium chloride dissolves in water to give an alkaline solution.

37 Ethanal and hydrogen cyanide react together. The reaction mechanism involves cyanide ions.

–
CH3 H 3C O H 3C OH
C O C H CN C + CN–

H CN– H CN H CN

Which statements about this mechanism are correct?

1 CN– acts as a catalyst.

2 CN– is a nucleophile.
3 It is an addition reaction.

© UCLES 2020 9701/12/F/M/20 [Turn over

 14

The responses A to D should be selected on the basis of

A B C D

1, 2 and 3 1 and 2 2 and 3 1 only

are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

38 Which compounds will produce a yellow precipitate with alkaline aqueous iodine?

1 2 3
OH
OH
HO O

OH

OH

39 Which statements apply to tetrafluoromethane?

1 It is rapidly decomposed by ultraviolet radiation.

2 It is less harmful to the ozone layer than dichlorodifluoromethane.
3 It is a non-polar molecule.

40 Which statements comparing ethene and ethane are correct?

1 The bond angles in ethene are larger than the bond angles in ethane.
2 Ethene reacts much more quickly with bromine in the dark than ethane does.
3 Complete combustion of 0.01 mol of ethene or ethane produces the same volume of gas
measured at room temperature and pressure.

© UCLES 2020 9701/12/F/M/20