chemistry

CHEMISTRY

Which of the following statements about
atomic emission spectroscopy is
incorrect
?
A Each element provides a characteristic
spectrum.
B Visible light is used to promote electrons
to higher energy levels.
C The lines arise from electron transitions
between one energy level and another.
D The quantity of the element can be
determined from the intensity of radiation
transmitted.
6.
Which of the following diagrams best
represents the arrangement of atoms in the
IF
4

ion?
Note: a lone pair of electrons is represented
by
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[X012/701]
[Turn over
1.
An atom of iron contains 26 electrons.
Which of the following diagrams below
correctly represents the distribution of
electrons in the 3d and 4s orbitals in an atom
of iron in its ground state?
2.
An atom has the electronic configuration
1s
2
2s
2
2p
6
3s
2
3p
1
What is the charge on the most probable ion
formed by this element?
A+1
B+2
C+3
D+4
3.
According to the aufbau principle, electrons
fill orbitals in the order
A 1s 2s 2p 3s 3p 4s 4p 3d
B 1s 2s 2p 3s 3d 3p 4s 4p
C 1s 2s 2p 3s 3p 3d 4s 4p
D 1s 2s 2p 3s 3p 4s 3d 4p.
4.
Which line in the graph represents the trend
in successive ionisation energies of a Group 2
element?
A
B
C
D
3d 4s
Ionisation
energy/
kJ mol
-1
1st 2nd 3rd 4th
Ionisation
A
B
C
D
A
B
C
D

12.
An aqueous solution of iodine was shaken with
cyclohexane until equilibrium was established.
Some solid iodine was added to the test tube
and the contents shaken until equilibrium was
re-established.
Which line in the table shows the effects
caused by the addition of the solid iodine?
13.
An acid is a substance which
A donates a proton leaving a conjugate acid
B donates a proton leaving a conjugate base
C accepts a proton leaving a conjugate acid
D accepts a proton leaving a conjugate base.
14.
The pH ranges over which some indicators
change colour are shown below.
Which line in the table shows the indicator
most suitable for the titration of hydrochloric
acid with ammonia solution?
7.
Which of the following solids is likely to have
the same type of crystal lattice structure as
caesium chloride?
ABa
2+
O
2–
BFe
2+
O
2–
CAg
+
I

DNi
2+
O
2–
8.
An ionic hydride is added to water.
Which line in the table correctly describes the
gas produced and the type of solution formed?
9.
An element forms an oxide which is a gas at
room temperature.
Which type of bonding is likely to be present in
the element?
A Ionic
B Metallic
C Polar covalent
D Non-polar covalent
10.
Which of the following oxides would produce
the solution with the greatest conductivity
when 0
.
1 mol is added to 250 cm
3
of water?
ASO
2
BCO
2
CNa
2
O
DAl
2
O
3
11.
2NH
3
(g) N
2
(g) + 3H
2
(g)
?
H° = 92 kJ mol
–1
The conditions favouring the decomposition of
ammonia are
A low pressure and low temperature
B high pressure and low temperature
C low pressure and high temperature
D high pressure and high temperature.
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Type of
solution formed
Concentration of
iodine
in water
Concentration of
iodine in
cyclohexane
Partition
coefficient
increases increases no change
increases increases increases
no change increases no change
increases
A
B
C
D no change increases
Gas produced
acidic
hydrogen
A
B
C
D
alkaline
hydrogen
acidic
oxygen
alkaline
oxygen
pH range
Indicator
4
.
2 – 6
.
3
Methyl orange
A
B
C
D
6
.
0 – 7
.
6
Bromothymol blue
6
.
8 – 8
.
4
Phenol red
8
.
3 – 10
.
0
Phenolphthalein
U
iodine in cyclohexane
iodine in water

10.

CHEMISTRY

This section of the question paper consists of 20 multiple-choice questions.
1.
The diagram shows part of the Periodic Table.
Which
two
elements show similar chemical properties?
A Li and C
B C and P
C Br and Kr
D Li and Rb
2.
Which of the following cylinders contains a mixture of gases?
A
B
C
D
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[Turn over
1
Li
Rb
Column 2 3 4
C
P
Br Kr
5670
air
nitrogen
carbon dioxide
hydrogen chloride
3.
Which of the following compounds contains oxygen?
A Calcium chloride
B Lithium sulphide
C Potassium nitrate
D Sodium chloride
4.
The diagram below shows a molecule of carbon dioxide.
Which line in the table is correct for this molecule?
5.
The structures of substances can be represented by models.
Which of the following models shows an element?
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OCO
A
Particles joined together
in the molecule
atoms weak
strong
weak
strong
atoms
ions
ions
Strength of bonds inside
the molecule
B
C
D
AB
CD