2

Section A
For each question there are four possible answers, A, B, C, and D. Choose the one you consider
to be correct.
1 Of the following, one mole of sodium chloride, NaCl, is best represented by

A
B
C
D

6.02 x 1023 molecules of NaCl

58.5 g of NaCl
6.02 x 1023 atoms
6.02 x 1023 ions

2 In an experiment, 10 cm3 of a hydrocarbon underwent complete combustion in 50 cm 3 of

oxygen (an excess volume). The final gaseous mixture contained 20 cm 3 of carbon dioxide
and 20 cm3 unreacted oxygen. All gaseous volumes were measured under identical
temperature and pressure. What is the molecular formula of the hydrocarbon?
A
B
C
D
3

CH4
C2H6
C2H4
C3H6

The mass spectrum for a sample of a metal is shown below.

The relative atomic mass of the metal is

A 63.2

B 63.4

C 63.6

D 64.0

Which of the following statements about SO2 molecules is true?

A the O=S=O bond angle is 180
B they have two lone pairs and two bond pairs
C they have one lone pair and two bond pairs
D they are trigonal planar

Which one of the following elements has the largest second ionization energy?

A
B
C
D

The complete combustion of ethanol is represented by the following equation:

C2H5OH (l) + 3O2 (g) 2CO2 (g) + 3H2O (l)
During this reaction,
A
B
C
D

S
Cl
Ar
K

only covalent bonds break

intermolecular forces and covalent bonds break
only intermolecular forces break
ionic bonds break

Consider the following reaction.

C (graphite) C (diamond) H = +2kJ
From the above statement, we can conclude that
A
B
C
D

the formation of a mole of graphite from diamond will release 2 kJ of energy

to convert 2 moles of graphite into diamond, 2kJ of energy must be absorbed.
the total energy of reactants is greater than the total energy of products.
the conversion of 2 moles of diamond to graphite will absorb 4 kJ of energy

[Turn over

In the Haber process for the manufacture of ammonia, why is the heterogeneous catalyst iron
in a finely divided state?
A
B
C
D

to increase its surface area

to produce the maximum reduction in the activation energy
to reduce its loss during the reaction
to reduce its surface area

What is the best definition of rate of reaction?

A The time it takes to use up all the reactants
B The rate at which all the reactants are used up
C The time it takes for one of the reactants to be used up
D The increase in concentration of a product per unit time

10 In 1999, researchers working in the USA believed that they had made a new element and that
it had the following electronic structure.
[Rn] 5f14 6d10 7s2 7p6
In which group of the Periodic Table would you expect to find this element?
A II

B IV

C VI

D0

11 Which of following statements about an acid is incorrect?

A It donates positive protons.
B It accepts negative ions.
C It produces hydrogen ions in water.
D It reacts with a base

12 Every year millions of tonnes each of chlorine and sodium hydroxide are
manufactured by the electrolysis of brine using a diaphragm cell.
What is the purpose of the diaphragm in such a cell?
A
B
C
D

to prevent chlorine gas escaping into the factory

to prevent the build up of pressure in the electrolysis cell
to provide a large surface area of electrode
to stop the products of electrolysis from reacting together

13 The value of the equilibrium constant, Kc, for the reaction to form nitrogen dioxide from
nitogen monoxide and carbon dioxide is 4.0 at 60 C.
NO (g) + CO2 (g)

NO2 (g) + CO (g)

When 1.0 mol of nitogen monoxide and 1.0 mol of carbon dioxide are allowed to reach
equilibrium at 60 C, what is the number of moles of nitrogen dioxide formed?

14 Which of the following elements is the best electrical conductor?

A Iodine
B Phosphorus
C Mercury
D Diamond
15 Which of the following solids is an example of a substance with a macromolecular structure?
A Silicon(IV) oxide
B Aluminium chloride
C Sodium chloride
D Magnesium oxide
[Turn over
16 Which one of the following reagents, when mixed and heated with ammonium sulfate,
liberates ammonia?
A
B
C
D

Calcium oxide
Sulfuric acid
Nitrogen gas
Aqueous bromine

17 In oil refineries, an important process is the recovery of any sulfur from petroleum. Sulfur
compounds are converted into gas hydrogen sulfide, H2S, by using a catalyst. The H2S is then
oxidized by using a controlled amount of air to give steam, H2O(g), and sulfur, S(s).
The enthalpy change of formation of H2S(g) is -20.5 kJmol-1 and that of H2O(g) is -243.0 kJmol1
.
What is the enthalpy change of reaction per mole of H2S?
A
B
C
D

-202.5 kJmol-1
-222.5 kJmol-1
-263.5 kJmol-1
-445.0 kJmol-1

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 When either chlorine or hydrogen chloride is passed over a heated metal M, the same
chloride is produced. An aqueous solution of this chloride is acidic. Which one of the
following could be M?
A
B
C
D

Aluminium
Barium
Sodium
Iron

20 What is the main reason why it is difficult to form nitrogen compounds from gaseous
nitrogen?
A
B
C
D

All reactions of N2 are endothermic

The triple bond in nitrogen is three times as strong as N-N single bond
The bond dissociation energy of N2 is very high
The first ionisation energy of nitrogen atom is very high

21 Smoke from a bonfire contains a compound that causes irritation to eyes. This compound
readily decolourises aqueous bromine and produces a precipitate of silver when bubbled into
Tollens reagent.
What is a possible structure of the compound?

22 Which structure could be part of a chain of poly(chloroethene)?

A
B
C
D

CCl2CCl2CCl2
CH2CHClCH2
CHClCHClCHCl
CCl2CH2CCl2

23 When bromoethane is hydrolysed by aqueous sodium hydroxide, which ion brings about the
first stage of substitution?

A
B
C
D

the electrophile Na+

the nucleophile Na+
the electrophile OH
the nucleophile OH

[Turn over
24 What is the product when the monomer of (CH2CCl2)n reacts with chlorine in an
organic solvent?
A
B
C
D

CCl2=CCl2
CCl3CCl3
CHCl2CCl3
CH2ClCCl3

25 Which of the following is a propagation step in the reaction between methane and chlorine?
A Cl2 2Cl
B CH3 + Cl CH3Cl
C CH3 + HCl CH3Cl + H
D CH3 + Cl2 CH3Cl + Cl
26 The structures for two alarm pheromones for ants are given.
CH3CH2CH2CH=CHCHO and CH3CH2CH(CH3)COCH2CH3
Which characteristic applied to both compounds?
A
B
C
D

Both can be obtained by oxidation of alcohols.

Both decolourise aqueous bromine.
Both decolourise dilute alkaline potassium manganate (VII).
Both show optical isomerism.

27 Some chlorobutanes were separately treated with hot ethanolic sodium hydroxide. Two of
these gave the same hydrocarbon, C4H6.
From which pair of chlorobutanes was this hydrocarbon obtained?
A CH3CH2CH2CH2Cl and CH3CH2CH2CHCl2
B CH3CHClCHClCH3 and ClCH2CH2CH2CH2Cl
C CH3CH2CH2CH2Cl and ClCH2CH2CH2CH2Cl
D CH3CH2CH2CH2Cl and CH3CH2CHClCH3

28 It is claimed that many polyunsaturated margarines contain esters derived from cis-cislinoleic acid, CH3(CH2)4CH=CHCH2CH=CH(CH2)7CO2H.
Which skeletal formula of linoleic acid contains the cis-cis arrangement?

29 Propan-1-ol, C3H7OH, is dehydrated by passing its vapour over hot aluminium oxide to give
a hydrocarbon.
Which structural formula represents the product obtained when the hydrocarbon reacts with
bromine?

30 How many moles of hydrogen chloride are evolved when an excess of PCl5 is added to one
mole of citric acid?

A 0

4
[Turn over

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 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

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

31 A species R has the following electronic configuration.

Which could R be?

1 Cl+ ion
2

S atom

3 Ar2 ion

32 Which statements correctly represent the behavior of an ideal gas? (p denotes pressure, Vm
molar gas volume, M molar mass, c concentration, d density and T temperature)
1

pVm T

pM dT

p cT

33 Gaseous particle X has a proton number n and a charge of +1.

Gaseous particle Y has a proton number of (n+1) and is isoelectronic with (has the same
number of electrons as) X.
Which statements correctly describe X and Y?
1 X has a larger radius than Y.
2 X requires more energy than Y when another electron is removed from each particle.
3 X releases more energy than Y when an electron is added to each particle.
34 Which statements about the manufacture of aluminium by electrolysis are correct?
1
2
3

The high temperature of the alumina/cryolite melt is partly maintained by the reactions
on the carbon anode surface.
Cryolite is used so that the melting point of the electrolyte is lower.
Aluminium, being more dense than the molten electrolyte, sinks to the bottom of the cell.

35 Sodium reacts with ammonia to give hydrogen and sodamide which ionic.
2Na + 2NH3 2NaNH2 + H2

10

Which changes in oxidation number of the three elements involved occur?

1
2
3

-3 to -2
0 to +1
+1 to 0

36 Many ceramic materials based on silicon (IV) oxide have recently been developed.
Which properties apply to these materials?
1
2
3

They are heated during manufacture and form solids.

They are heat-resistant solids.
They are good conductors of electricity due to delocalized electrons.

37 For the sequence hydrogen chloride, hydrogen bromide and hydrogen iodide, there is an
increase in
1
2
3

Thermal stability.
Bond length.
Ease of oxidation.
[Turn over

38 Halothane is widely used anaesthetic.

Which statements about Halothane are correct?

1 It is relatively unreactive.
2 The molecule has a chiral centre.
3 It may cause depletion of the ozone layer.
39 Malic acid, HO2CCH(OH)CH2CO2H, is found in apples.
Which properties does malic acid have?
1
2
3

It can form esters both with ethanoic acids and with ethanol.
Its molecule contains a secondary alcohol group.
Its molecule has one chiral centre.

40 Which compounds may be prepared from C6H5CHBrCH3 by the action of sodium hydroxide
under different conditions?
1
2

C6H5CO2Na
C6H5CH(OH)CH3
3 C6H5CH=CH2