SULIT 4541/1

4541/1
Chemistry
Paper 1
September
2007
1¼ hours

ZONE A, KUCHING

TRIAL SPM EXAMINATION 2007

CHEMISTRY
Paper 2
One hour fifteen minutes

DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO.

INFORMATION FOR CANDIDATES

1. This question paper consists of 50 questions.

2. Answer all questions.
3. Answer each question by blackening the correct space on the answer sheet.
4. Blacken only one space for each question.
5. If you wish to change your answer, erase the blackened mark that you have made. Then blacken the
space for the new answer.
6. The diagrams in the question provided are not drawn to scale unless stated.
7. You may use a non-programmable scientific calculator.

_____________________________________________________________________________________
This question paper consists of 22 printed pages.
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Diagram 1
Diagram 1 shows a bottom gas jar filled with brown bromine gas and the upper gas jar is filled with
air. The gas jar cover is then removed. Which of the following figure below shows the arrangements
of the particles after 40 minutes?

Isotopes are atoms with the same number of

A protons, electrons and neutrons.

B electrons but different number of protons.
C protons but different number of neutrons.
D protons and neutrons but different number of electrons.

Which of the following graphs represent the heating of naphthalene until it turns liquid?

Which of the diagrams below represents sodium chloride?

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A compound with formula X2SO4 has a relative formula mass of 174. What is the relative atomic
mass of X? [Relative atomic mass: O,16; S,32].

39
52
78
104

Three elements are represented by the letters X, Y and Z. One atom of Z is two times heavier than
one atom of Y. One atom of Y is three times heavier than one atom of X. If the relative atomic mass
of X is 31, what is the relative atomic mass of Z?

62
93
155
186

When 1.52 g of a metal oxide of M is reduced, 1.04 g of the metal is obtained. Determine the
empirical formula of the metal oxide.
[Relative atomic mass: O,16; M,52].

MO2
M2O
M2O3
M3O2

8 Which of the following chemical equations is balanced?

2 C8H18 + 25 O2  16 CO2 + 18 H2O

Na2S2O3 + 2HCl  2NaCl + S + SO2 + H2O
2Fe + 3Cl2  2FeCl3
(NH4)2SO4 + 2NaOH  Na2SO4 + 2NH3 + H2O
I, II and III
I, III and IV
II, III and IV
I, II, III and IV

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10 g of calcium carbonate is added into excess hydrochloric acid. Determine the volume of carbon
dioxide gas evolved at room temperature. [Relative atomic mass : C,12; O,16; Ca,40; 1 mole of gas
occupies a volume of 24 dm3 at room condition]

0.9 dm3
1.2 dm3
1.8 dm3
2.4 dm3

In the Periodic Table, P is below Q in the same group. If the proton number of atom Q is 11, what is
the electron arrangement for atom P?

2.1
2.8.1
2.8.8.1
2.8.2

Table 1 shows the electron arrangement for elements E, F, G and H. The letters used are not the
actual symbol of the elements.

Element Electron arrangement

E 2.8.1
F 2.8.2
G 2.4
H 2.7
Table 1

Which of the following is an element of Period 3 and Group 2?

E
F
G
H

Diagram 2 shows a chemical cell. The cell is left for 30 minutes for the reaction to occur.

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Magnesium Copper Rod

Porous Pot

Magnesium sulphate Copper (II) sulphate solution

solution
Diagram 2
Which of the following statement are correct about the cell?

Porous pot is used to allow movement of ions

The intensity of blue copper sulphate solution decreases
Electrons flow from magnesium electrode to copper rod outside the circuit
Copper electrode become thicker
IV only
I and III only
I, II and III only
I, II, III and IV
Table 2 shows the number of proton, electron and neutron of R and Q atoms.

Number of
Atom
Protons Electrons Neutrons

R 10 10 10
Q 17 17 18
Table 2

Which of the following is NOT TRUE about R and Q atoms ?

R exists as a monoatomic gas.

R can react with Q to form a covalent compound.
Q exists as diatomic molecule.
Q reacts with sodium to form an ionic compound.

Diagram 3 shows the symbols for two elements. The letters used are not the actual symbol of the
elements.

Diagram 3

When X react with Y, an ionic compound will be formed. What is its chemical formula?
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X 2Y
XY2
X2Y3
XY

Diagram 4 shows the electron arrangement of a compound formed between atoms A and H.

Diagram 4

Which of the following statement is true about the compound?

This compound has high melting point.

This compound has high boiling point.
This compound is formed by sharing of electrons.
This compound is formed by electron transfer.

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Element M N L P
Proton number 8 16 19 12
Table 3

Table 3 shows proton number for 4 elements M, N, L, P. Which of the following pairs will form
ionic and covalent compounds?

Ionic compound Covalent compound

L and N M and N
M and N L and P
M and L P and N
M and P L and N

The following metallic pairs are used as electrodes in a chemical cells, their potential difference
produced by the cells were measured and recorded as shown in Table 4.

Metallic pairs Voltage Positive terminal

R/X 0.5 X
S/X 4.0 X
T/X 5.5 X
W/X 3.0 X
Table 4

The electropositivity of metals in descending order is

R, S, T, W
T, S, W, R
R, S, W, S
W, R, S, T

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Sodium chloride is an ionic compound. It cannot conduct electricity in solid state but it can conduct
electricity in molten state. This is because

It consists of molecules in solid state and converts to ions in molten state

It consists of ions that are free to move in molten state, but not in solid state.
The ions have not enough kinetic energy.
The ions have a lot of free electrons.

Which of the following substances are electrolytes?

Molten lead(II) bromide

Sodium chloride solution
Dilute acids and alkalis
Glacial ethanoic acid
I, II, and III only
I and II only
I and IV only
II and IV only

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An experiment is carried out to study the electrolysis of copper (II) sulphate solution using copper
electrodes as shown in Diagram 5.

Copper Copper

Copper (II) sulphate

solution
Diagram 5

Which of the following are the observations when the switch is on?

The intensity of the blue colour of copper (II) sulphate solution is decreasing.
Anode becomes thinner
Shiny brown metal deposited around copper cathode and become thicker
Bubbles of gas liberated at anode.
I, II and III only
II and III only
III and IV only
IV only

When dilute hydrochloric acid and aqueous sodium hydroxide solution reacts, the ionic equation for
the reaction can be represented by

H+ + OH-  H2O
2H+ + O2-  H2O
Na+ + Cl-  NaCl
H+ + Cl-  HCl

Which of the following elements burn in the oxygen to form an acidic oxide?

Sodium
Copper
Sulphur
Magnesium

The pH value of 0.1 mol dm-3 sodium hydroxide solution is higher than the pH value of 0.1 mol dm -3
ammonia solution. This is because

sodium hydroxide is more soluble in water than ammonia.

the concentration of hydrogen ion in sodium hydroxide solution is higher than the
concentration of hydrogen ion in ammonia solution.
the concentration of hydroxide ion in sodium hydroxide solution is higher than the
concentration of hydroxide ion in ammonia solution.
sodium hydroxide ionizes partially in water whereas ammonia ionizes totally in water.

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The structure of propanoic acid is shown below:

Which of the hydrogen atoms ionizes in water?

Ha
Hb
Hc
Hd

The best method to prepare the insoluble lead (II) sulphate salt is by

reacting lead (II) oxide with sulphuric acid.

reacting lead (II) hydroxide with sulphuric acid.
reacting lead metal with sulphuric acid.
reacting aqueous solutions of potassium sulphate solution with and lead(II) nitrate solution.

The best substance that can be used to differentiate hydrochloric and sulphuric acid is

Zinc metal
Barium nitrate solution
Lead (II) nitrate solution
Calcium carbonate

A solution X turns orange acidified potassium dichromate(VI) green and ethanoic acid is obtained.
What formula best represents solution X?

CH3OH
C2H5OH
CH3COOH
CH3COOCH3

What is the major component used to make alloy for the body of the aeroplane?

Zinc
Iron
Aluminium
Copper
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Which of the following is not considered as a type of ceramic?

Cement
Porcelain
Fibreglass
Superconductor

What is the function of vanadium (V) oxide used in the oxidation of sulphur dioxide to sulphur
trioxide in the Contact Process?

It acts as a reducing agent.

It prevents the decomposition of sulphur trioxide.
It removes impurities.
It speeds up the reaction.

Excess calcium carbonate is added to 20 cm 3 of 0.2 mol dm-3 hydrochloric acid at room temperature.
The experiment is repeated using hydrochloric acid of the same volume and concentration but heated
to a higher temperature. Which of the following graphs in Diagram 6 show the volumes of gas
collected at regular intervals for the two experiments?

Volume
of gas
(cm3) P

R
S

Diagram 6 Time (s)

Original experiment Repeated experiment

A S R
B S Q
C R Q
D R P

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In the following graph, curve X represents the results of the reaction between 1.0 g of granulated
zinc and an excess of acid at 30°C. Which of the following will produce curve Y?

Volume of gas (cm3 )

Time (s)

Using 1.0 g of powdered zinc at 20°C

Using 1.0 g of powdered zinc at 20°C
Using 0.5 g of powdered zinc at 40°C
Using 0.5 g of powdered zinc at 20°C

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Diagram 7 shows an energy profile for the reaction between P and Q to produce R.
P+ Q  R
Energy Level

P+Q
230 kJ mol-1

R
-1
130 kJ mol

60 kJ mol-1

Progress of reaction

Diagram 7

What are the values of activation energy and heat of reaction for the reaction?

Activation energy Heat of reaction

A 60 kJ mol-1 -130 kJ mol-1
100 kJ mol-1 -170 kJ mol-1
100 kJ mol-1 -70 kJ mol-1
230 kJ mol-1 -70 kJ mol-1

Which of the following are NOT organic compounds?

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Coal
Silica rocks
Natural gas
Marble
I and II only
I, II and IV only
II and IV only
I, II, III and IV
Complete combustion of one mole of an alkene in excess oxygen produces two moles of carbon
dioxide and water. The alkene is

ethene
propene
butane
pentene

Cyclohexene and cyclohexane are colourless liquids. All the following can be used to distinguish
both liquids, except

Liquid bromine
Acidified potassium manganate(VII) solution
Combustion
Sodium hydroxide solution

Diagram 8 shows the structural formula of an alcohol.

H C H

H H

H C C C O H

H H

H C H

Diagram 8

What is the IUPAC name for this compound?

A Pentan – 1 – ol
B 2 – methylpropan – 1 –ol
C 2,2 – dimethylpropan – 2 – ol
D 2,2 – dimethylpropan – 1 – ol

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Ethyl butanoate has the pineapple flavour. One of the properties of ethyl butanoate is

A soluble in water.
B has a low boiling point.
C conducts electricity.
D has a higher density than water.

Natural rubber is an example of an addition polymer. Which of the following is the monomer of a
natural rubber?

A H H

CH3 C C CH3

B CH3 H

CH2 C C CH2

C CH3 H

CH3 C C CH3

D CH3 CH3

CH2 C C CH3

The following equation represents a redox reaction.

C2H4 (g) + 3 O2 (g) 2 CO2 (g) + 2 H2O (l)

In this equation, the oxidation number of carbon changes from

A - 2 to + 4
B - 2 to + 2
C - 2 to 0
D + 2 to 0

An experiment is carried out as shown in Diagram 9.

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Diagram 9

Which of the following is NOT true about this experiment?

A Iron (II) sulphate solution changes from green colour to brown.

B Chlorine water acts as an oxidising agent.
C Electrons flow from P to Q through the external circuit.
D Iron (II) ion is oxidized.

Diagram 10 shows the set up of an experiment to investigate the effect of magnesium on the rusting
of iron. Predict the observation of the experiment after a few days.

Diagram 10

Intensity of blue Intensity of pink

Condition of nail
colouration colouration
A Not present High No rust
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B High Not present No rust

C High Low Rust present
D Moderate Low Rust present

A simple chemical cell is shown in Diagram 11.

Diagram 11

Which of the following process occur at electrode P and Q?

Metal P Metal Q
A Reduction Oxidation
B Oxidation Reduction
C Displacement Oxidation
D Oxidation Displacement

Diagram 12 below shows an energy level diagram.

Energy
NaOH + HCl

ΔH
NaCl + H2O

Diagram 12

Which of the following statement is true for the diagram shown above?

A The energy content of the products is higher than the energy content of the reactants.
B ΔH is the energy released when 1 mole of sodium hydroxide reacts with 1 mole of
hydrochloric acid.
C Heat of precipitation can be obtained from the energy level diagram.
D The reaction is an endothermic process.

When 1 mole of zinc is added to 2 moles of hydrochloric acid, t kJ of energy is liberated. How much
energy is liberated when 3 moles of zinc is added to 8 moles of hydrochloric acid?

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A t kJ
B 3t kJ
C 4t kJ
D 8t kJ

Diagram 13 shows the apparatus used in an experiment to determine the heat of precipitation of
silver chloride.

32.4oC

Polystyrene
cup

Diagram 13
What is the heat of precipitation of silver chloride?
[Density of the mixture: 1 g dm-3; Specific heat capacity of water: 4.2 J g-1 oC-1]

A - 34.5 kJ mol-1
B - 65.5 kJ mol-1
C - 819 kJ mol -1
D -112 kJ mol -1

10 cm3 of sulphuric acid is reacted completely with 25 cm 3 of 0.2 mol dm-3 sodium hydroxide
solution. The concentration of sulphuric acid is

A 0.20 mol dm-3

B 0.25 mol dm-3
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C 0.50 mol dm-3
D 1.00 mol dm-3

Diagram 14 shows the apparatus used to determine the heat of displacement of copper.

Polystyrene cup
X
3
50 cm of 1.0 mol
dm-3 copper (II)
nitrate solution

Diagram 14

The following metals can be used as X, except

A Magnesium
B Lead
C Zinc
D Silver

Process of soap making using plant oil and alkali is called

A Oxidation
B Hydrolysis
C Saponification
D Esterification

The correct ways of using medicine is extremely important. Which of the following step should be
avoided?

A Follow the instruction given

B Do not take medicine after the expiry date
C Complete the whole antibiotic course prescribed
D Self medication by taking medicine prescribed for others

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END OF QUESTION PAPER

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