first TERM EXAMINATION
SUBJECT: Chemistry CLASS: SSS 1
1. Which of the following substances is a mixture? A. undergone (A) sublimation (B) crystallization (C)
Granulated sugar B. Sea water C. Sodium chloride distillation (D) evaporation
D. iron fillings
12. The chromatographic separation of ink is based on
2. An element Z, contained 90% of 16Z8and 10% of the ability of the components to A. dissolve in each
18Z8. its relative atomic mass is? A. 16.0 B. 16.2 other in the column B.move at different speeds in
C. 17.0 D. 17.8 the column C.react with the solvent _ D.react with
each other
3. 3. Which of the following metals is purified
commercially by electrolysis? A. Zn. B.Fe. C. 13. Tetraoxosulphate(vi)acid burns the skin by
Sn D. Cu A.dehydration B. hydrolysis C. hydration D.heating
4. 4.The experiment that showed that atoms have tiny, 14. Sieving is a technique used to separate mixtures
positively-charged nucleus was first carried out by containing solid particles of A. small sizes B.large
A.Moseley B.Rutherford C.Millikan D. Dalton sizes C. different sizes D.the same sizes
5. 5.What is the IUPAC nomenclature of the 15. Which of the following substances is a mixture? A.
compound NaClO? A.Sodium oxochlorate(I) Sulphur powder B. Bronze C. Distilled water D.
B.Sodium chloro(I)oxide C.Sodium Ethanol
monooxochlorate(II) D.Sodium chloro(I)monoxide
16. Abalance chemical equation obeys the law of A.
6. A mixture of petroleum and water can be separated Conservation of mass B. Definite proportions C.
through A. the use of filter paper B. the use of a Multiple proportions D. Conservation of energy
separating funnel C. centrifugation D. distillation.
17. Which of the following substances is not a
7. A difference between chemical and physical change homogenous mixtures? A. Filtered sea water B. Soft
is that in a chemical change (a) heat is supplied (b) drink C. Flood water D. Writing ink
anew substance is formed (c)oxygen is formed (d)a
reversible process occurs 18. A mixture of lead (ID chloride and Jead (ID)
trioxonitrate (V) in water can be separated by A.
8. What is the correct IUPAC name for NO2-?A. crystallization _B. distillation -_C. filtration E.
Dioxonitrate (iv)ion. B. Trioxonitrate (iii}ion. sublimation
C.Trioxonitrate (iv) ion. D. Dioxonitrate(ili)ion.
19. A sample of impure local gin can be purified by A.
9. A heterogeneous mixture can be defined as any chromatography B. distillation -_C. electrolysis D.
mixture A.of a solute and a solvent B.whose fermentation E. filtration
composition is uniform C.whose composition is not
uniform D.formed by solids and liquids Uniform 20. A mixture containing equal amount of nickel
tetraoaosulphate (VI), cobalt (IN) chloride and zinc
10. A chemical reaction is always associated with (A) a tetraoxosulphate (VI) can best be separated by using
change in the nature of the reactants. (B) the ___ method A. chromatography B. crystallization
formation of new substances (C) a change in the _C. filtration D. fractional distiflation E. sublimation
volume of the reactants (D) an increase in the
composition of one of the substances
11. 11.When a solid substance disappears completely as 21. Which of the following substances would sublime
a gas on heating, the substances is said to have on exposure to the atmosphere? A. ice B. iodine C,
phosphorus D. potassium chloride -_E. sulphur
22. A mixture of oil and water can be separated by A. 32. The public and private sectors which offer job
evaporation B. magnetic separation C. separating opportunities to chemist are all except A.
funnel _D. sieving E. sublimation radioactivity B. Health Service C. Food processing
D. forestry
23. Two miscible liquids with boiling points of 75°C
and 85°C respectively can be separated by A. 33. The atomic number of chlorine is 17. What is the
crystallization B. evaporation C. filtration D. number of electrons in a chlorine ion? A 16 B. 17 C.
fractional distillation _E. simple distillation 18 D. 19
24. Chromatography is used to separate components of 34. What is the mass number of an element having 20
mixture which differ in their rate of A. diffusion B. neutrons, 15 protons and 15 electrons? (a) 15 (b) W
migration -C. reaction D. sedimentation _E. (c) 35 (d) 45
sublimation
35. An element X has isotopic masses of 6 and 7.if the
25. Which of the following methods can be used to relatve abundance is 1 to 12. 5 respectively what 2
separate 2 mixture of two miscible liquids with the reatve atorme mess of X? A.6.0 B. 6. 1 C. 6.9
different boiling points? A, decantation -_B. D. 7.0
distillation C. evaporation D. filtration
36. Which of the following scientists discovered the
26. A substance is said to be impure if A. its melting neutron? A. Ernest Rutherford B. J.J. Thompson C.
point ranges is wide B. it dissolves in water with James Chadwick D.R.A. Millikan
difficulty ' C ithas alow melting point D. it is
coloured. 37. How many protons does 40Ca20 contain? A.20 B.
30 C. 40 D.60
27. The separation of petroleum fractions depends on
the differences in their A. melting poims B. molar 38. lf 100 atoms of element X contains 70 atoms of 9X
masses C. solubilities D. boiling points and 30 atoms of 11X, calculate the relative atomic
mass of X. A.9.6 B. 10.6 ©. 11.6 D. 20.0
28. A compound U melts at 82°C and boils at 113°C. If
U was found to be insoluble in water, 8 mixture of U 39. 39.Given the symbol 40Y20 itcan be deduced that Y
in water could best be separated by A. has A. 60 neutrons. B. an atomic number of 20. C. a
chromatography B. sublimation C. filtration D. the mass number of 60. D. 40 electrons. E. 40 Protons
use of separating funnel Studying chemistry gives us 40. The Mass Number of an atom of an element is the
training in the A, scientific method B. burning field sum of ts A electrons, neutrons and protons. B
C. oil and margarine D. routing leaves electrons and Protons C protons and neutrons. D.
29. When hypothesis has been tested and found to be orbital eiectrons E valence electrons
within the limits of available evidence it becomes A.
experiment B. theory C. positive results D. law
30. 30.These are adverse effects of chemistry except A.
pollution B. population C. corrosion D. drug abuse
31. Rusting can be prevented by the following except A.
alloying C. supportive method D. application of
protective coating B. cathodic protection
first TERM EXAMINATION
SUBJECT: Chemistry CLASS: SSS 2
1. Cathode rays cause an object places behind a perforated anode A. First ionization energy B. Second ionization energy C. Electron
to cast a shadow on the screen. This observation shows that the affinity D. Electronegativity
rays A. Are positively charged B: Are negatively charged C. Have
mass D. Travel in straight lines 19, The atomic number of an element whose carbon X2+ has the
ground state electronic configuration 1S22S22SP632P6 is A. 16 B.
2. Which of the following metals is purified commercially by 18 C. 20 D. 22 E. 24
electrolysis? A. Zn B.Fe CSn D.Cu
20. What is the oxidation number of Z in K3ZCl6 A. -3 B. +3 C. -
3. What current will deposit 3.25g of zinc in 2 hrs? A. 3.25A_ 6 D. +6
B.2.00A C. 134A D.0.67A [Zn = 65, F=96500C mol]
21. The acid used in electrolysis of water is dilute A. HNO3 B.
4.How many unpaired electrons are in the p-orbital of fluorine CH3COOH C. H2So4 D. HCl
atom? A. 2 B.3 C.:0 D. 1
22.The elements that belong to the third period of the periodic
5.Which of the following gases is employed as an anesthesia? table are B, C, N and O. A. B,C,N and O B. Na, Mg,S and Ar C.
A.NOB.N20 C NO2 D.NH3 Li, Be, Aland P D. Na, P, O and Cl
6.How many unpaired electron(s) are they in Nitrogen Nitrogen 23. Zn0 + CO--------Zn + C02. In the reaction above, zinc has
sub-levels?. A. 1 B. 0 C.3 D.2 been _ (A) displaced (B) oxidized (C) reduced (D} Decomposed
7.Element in the same period in the periodic table have the same A 24. The noble gases owe their inactivity to (a)hexagonal shape
Chemical properties B Physical properties C Number of shells D (b)octet configuration (c)obtuse configuration (d) cyclic shape
Atomic number
25. Which of the following is an electrolyte? A. Mercury B.
8. What quantity of aluminum is deposited when a current of 10A Alcohol C Sodium acetate solution D. solid potassium hydroxide.
is passed through a solution of an aluminum hydride for 1930s? A.
5.4 B.14.2g C.0.2g D.1.8g{Al =27, F= 96 500 Gmol] 26. The commonest feature of reactions at the anode is that A.
electrode Dissolves B. electrons are consumed C. oxidation is
9.The compound that is used as an anesthetic is (A) CH2Cl2(B) involved D. ions are reduced
CH3Cl (C) CCl4 (D) CHCl3
27. The boiling of fat and aqueous caustic soda is referred .....A.
10.The Oxidation state of carbon in HCOOH is A.-1 B.+2 C. +3 acidification B hydrolysis C saponification D esterification
D.O
28. Cu2S + 02---- -» 2Cug+ S0. What is the change in the
11. If the electron configuration of an element is 1s22s22p5, how oxidation number of copper in the reaction? A. 0 to +2 B. O to +1
many unpaired electrons are there? A. 1 B2 C4 D.5 C. +1 to 0 D. +2 to +1
12.How long would it take to deposit 0.08g of copper from CuCl2 29. Tetraoxosulphate(vi)acid burns the skin by A dehydration B.
solution by passing a current of 0.5A? A.’ 48mins B. 24mins C. hydrolysis C. hydration D cheating
8mins D.6mins [Cu = 64, Fs 76500 C mole
30. When ∆H is negative, a reaction is said to be A. exothermic
13.C2H4 + H2-- --C2H6 ∆H= -137KJ mol-1 The reaction _B. endothermic C. ionic D reversible
represented above is A. endothermic’ B. exothermic C. in
equilibrium D. spontaneous 31. The least easily oxidized of the metals below is A. Ca B.Na
C.Zn D.AI
14. The element with the electronic configuration 1s22S22p3 is
(a)oxygen (b) chlorine (c)nitrogen (d)calcium 32. Sucrose is made up of A. glucose and glucose B. glucose and
fructose C. fructose and fructose D. galactose and glucose
15.What is the valence shell electron configuration of the element
with atomic number 17? A.1s22s22p3s23p4. 33.Calcium and magnesium belong to the same group in the
B.1s22s22p3s23p5 C. 2s22p6 D.3s23p° periodic table because bothA. are metalsB. form colorless salts C.
have the same number of valence electrons D. form captions
16. The number of electrons in the valence shell of an element of
atomic number 14 is A. 1 B. 2 C. 3 D4 34. In the modern periodic table, the period indicates the value of:
(a) atomic number (b) atomic mass. (c) principal quantum
17. which of the following physical properties decreases down a number. (d) azimuthal quantum number.
group in the be periodic table? A. Atomic radius B. Ionic radius
C. Electropositivity D. Electronegativity 35. An element with atomic number 20 is placed in which period
of the periodic table?(a) 4 (b) 3. (c) 2 (d) 1.
18. The energy change accompanying the addition of an electron
to gaseous atom js called; 36. Considering the elements B, Al, Mg, and K, the correct order
of their metallic character is(a) B > Al > Mg > K (b) Al >
Mg > B > K. (c) Mg > Al > K > B (d) K > Mg > 2. (a) Calculate the oxidation number of the element underlined
Al > B. below. 1 K2Cr2O7 2. H2SO4 3. XO3-4. 4.Na2CO3 5. K2CO3 (b)
State five (5) properties of Group I, VI and O in the periodic table.
37. What is the oxidation number of Chromium in K2CrO4? (a) +1 a; What is electrolysis? (d) State the element that is 1) oxidized (2)
(b) +2 (c} +4 (d) +6 Reduced (3) Reducing Agent (4) Oxidizing Agent i. NaO + H2
---» H2O + Na ii. Cu + H2O ----» CuO + H2 iii. Na2+ +
38. The activation energy of a reaction can be altered by (a) adding
Cl-. ----» CI2- + Na+ iv. Ag2+ + Cl3 -----> Ag3 + Cl- v. Zno+
reducing agent (b) applying high pressure (c) using a catalyst (d)
H2 ------ H2O+ Zn
changing the temperature
2. State 1st and 2nd law of electrolysis. A direct current of 0.3A
39. The oxidation number of iodine in the to date ion (I03-) is (a) -
flows for 3 hours through three cells connected in series. The cells
5 (b) -1 (c) +1
contain solutions of silver trioxonitrate (V), copper
40. How many orbitals are associated with the P-sub energy level? Tetraoxosulphate (Vi), nickel chloride solutions respectively.
(a) 2 (b) 3 (c) 5 (d) 6 Calculate the mass of the metal deposited in each cell. {Ag = 108,
Cu = 64, Ni = 59, Faradays constant = 96500 C mol} 2A zinc
Theory Part and copper voltammeters were connected together in series, lf a
current of 0.25A flows for 10 minutes, calculate the masses of zinc
1.(a) State five (5) characteristics of a catalyst. (b} What is and copper deposited, [Zn = 65, Cu = 64, Faradays constant =
chemical reaction? (c) Itemize 8 chemical reaction and explain any 96500C mol]
4. (d) Differentiate between positive and negative catalyst. E. State
periodic law and give 5 of it properties
CHRIST STARS COLLEGE
first TERM EXAMINATION
SUBJECT: Chemistry CLASS: SSS 3
1.. An example of a polysaccharide is A. Dextrose B. 17. Primary alkanols are oxidized to carboxylic acid,
Mannose C. Glucose D. Starch secondary alkanols are oxidized to alkanone while tertiary
alkanols are A. oxidized to alkanols B. oxidized to
2. Starch can be converted to ethyl alcohol by A. Distillation alkanone C. not oxidized D. oxidized to alkene
B. Fermentation C. Isomerization D. Cracking
18. The soluble of alkanols in water is due to A. the
3. Which of the following are made by the process of covalent nature B. hydrogen bonding C. their low
polymerization? A. Nylon and soap B. Nylon and artificial melting point D. their low melting point
rubber C. Soap and butane D. Margarine and nylon
19. When acidified KMnO4 is used as oxidizing agent for
4. What reaction takes place when palm-oil is added to alkanol, the color change observed isA. yellow to red B.
potash and foams are observed? A. Neutralization purple to colorless C. orange to green D. white to black
Saponification C. Esterification D. Salting-out
20. Which of the following enzymes converts glucose to
5. Which of the following compounds can bre represented ethanol? A. maltose B. zymase C. diastase D.
by the molecular formulate C2H6O? A. Propane B. Ethanol amyls
C. Methane D. Cumcose
21. The structure of soap according to saponification process
6. Which af the followino substances could be responsible is A. CH3(CH2)16COONa B. CH3CH2COOCa C.
for the banana of a flower? A. Methyl benzene B. Buthanol CH3CH2CH2COONa D. C2H5COONa
C. Ethanol D. Penthylethanoate
22. The example of soap less detergent is A. alkyl B.
7. Fats and oils are used as raw materials in the following ethylethanoate C. alkanol D. alkylbenzenesulphonates
industries EXCEPT ____ A. Paint industry B. Plastic
industry C. margarine industry D. cosmetic industry 23. Hydrophobic tail of soap dissolves in grease while
hydrophilic dissolves inA. benzene B. water C.
8. The IUPAC name of C2H5COOC2H5 is A. propanol D. kerosene
ethylethanoate B. ethylpropanoate C. propylethanoate
D.propylpropanoate 24. Fats and oils belong to a general group of compounds
known as ..A. glycerol B. soap C. margarine D.
9. The maior product formed by the reaction between lipids
ethanoic acid and gaseous sodium hydroxide is ....... A.
Soap B sodium ethanoate C. sodium methoxide D. water 25. Hydrolysis of fat and oil to yield alkanol and soap is
called A. esterification B. hydrogenation C.
10. How many isomers has C3H6Cl2? A. 2 B. 3 C. 4 D. 5 hydrolysis D. saponification
11. The functional group(s) present in amine acids is/are A. 26.Tertiary amine is represented as followA. R2NH2 B.
CONH2 B. CHO C. NH2 D.COOH (CH3)2NH C.R2NH3 D. R2N
12. What is addition of hydrogen to unsaturated fat known 27.Which of the following has fishy odourA. alkanoic acid
as? A. Dehydration B. Hydrogenation C. Translation B. alkanol C. amide D. amine
13. What catalyst is used during hardening of unsaturated 28.Amide can be regarded as derivatives of A.
fats? A. Aluminum oxide B. Enzymes C. Nickel alkanol B. policarboxylic acid C. monocarboxylic acid
D. carbonxamide group
14. What type of fats do vegetable oils tend to consist of? A.
mixture of saturated and unsaturated B. Unsaturated C. 29.During the hydrolysis of amides, one of the following is
Saturated produced. A. monocarboxylic acids B. water C. H2SO4
D. NaOH
15. What fats are believed to be healthiest? A. Saturated B.
Both type are equally healthy C. Unsaturated 30. Carbamide is an example of A. amine B. alkane C.
alkyl D. amide
16. The functional groups of the alkanol is A. CnH2n + 1
OH B. carboxylic group C. hydroxyl group D. 31. The process involved in the convention of amino
CnH2n+ 2 Maryanne is known as A. Hydrogenation B Condensation C.
Pyrolysis D. Dehydration E. Cracking
32. If X eacts with excess acidified K2 Cr207 to produce an Theory part two
alkanoic acid X is an A. alkanol B. alkene C. amino D.
alkanone (a) What are homologous series?
33. 0.1 Faraday of electricity deposited 2.95g of nickel (b) State the types of homologous series present in
during electrolysis of an aqueous solution. Calculate the petroleum.
number of moles of nickel that will be deposited by 0.4 (c) Give the example of compound belonging to each
Faraday A. 0.20 B. 0.30 C. 0.40 D. 5.87 [Ni = 58.7] homologous series (4) Draw the structure of the following.
34. If a current of 1.5A is passed for 4.00 hours through a (i) Ethy/ethanoate (ii) Ethy/propionate (iii) 1,2, -
molten tin salt and 13.3 of tin is deposited, what is the dibromoethane {iv) 2, 3.5 -trimethy pentane (v) 3
oxidation state of the metal in the salt? A 1B2 C3 DA [Sn = methyl/butane -2-Ol (vi) Ethy/propionate {e) List five (5)
118.7, F = 967500 mol fractions obtained from fractional distillation of petroleum.
(a) State the allotrope
35. Sucrose is made-up of A. glucose and glucose B. glucose
and Iryctose C. fructose and fifuctose D. galactose and 1(a). State 4 physical properties of amine (b). State 3
glucose physical properties and 3 chemical properties of amine.
36. Which of the following is an electrolyte? A. Mercury B. 2. Give the classes of amine according to the number of their
Alcohol Sodium acetate solution D. solid potassium alkyl groups.2b.State 3 chemical properties of amide.
hydroxide. C . State 3 uses of amine d. Write the IUPAC namte of the
37. The mass of silver deposited when a current of 10A is following compound. (i) CH3CH2COOCH3 (ii)
passed through a solution of silver salt fof 4830s is (A) 54 CH3CH2COOCH2CHs (iii) (CHyCH_OH (iv) CHyCOOH
0g (B) 27.0g (C) 125g (D) 108.0g (Ag =108, F = 96500C (v) CHyCH;CH,OH
mol '] 3. (a) Briefly explain the following: (i) Carbohydrate (ii)
38. The element with the electronic configuration1s22S22p3 esterification: (b) Benzene contains 6 carbon and 6 hydrogen
is A. oxygen B. chlorine C. nitrogen D. calcium (iii) cracking. Draw suitable structure of Benzene to show
39.The oxidation state of oxygen in Tetraoxosulphate(vi) kow these (c) Write the general formula for alkanoic acids.
acid is. A. -8 B.-4 C-2 D.+4 Draw a complete classification of carbohydrates
40.How lon g would it take to deposit 0.08¢ of copper from
CuCl: solution by passing a current of 0.5A? A. 48mins
B.24mins C Smins D.6mins {Cu = 64 F=96500€ mo} J,
