2
Section A
For each question, there are four possible answers A, B, C or D. Choose the one you
consider to be correct.
1
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
2
II
B
C
III
VI
D
0
The graph shows the first thirteen ionisation energies for element X.
What can be deduced about element X from the graph?
3
A
It is in the second period (Li to Ne) of the Periodic Table.
B
It is a d-block element.
C
It is in Group II of the Periodic Table.
D
It is in Group III of the Periodic Table.
Chlorine has the electronic configuration 1s2 2s2 2p6 3s2 3p5. Which of the following
compounds of chlorine is not likely to exist?
A
KClO5
© YJC Chemistry Unit
B
CuCl
C
ClO2
JC1 BT/2012/8872/01
D
Cl2O7
3
4
5
In which of the following does ionic bonding occur between the named atoms?
A
Aluminium and chlorine in the tetrachloroaluminate ion.
B
Hydrogen and chlorine in hydrogen chloride.
C
Boron and fluorine in boron trifluroide.
D
Hydrogen and sodium in sodium hyride.
The antidote molecule shown can help to prevent liver damage if someone takes too
many paracetamol tablets.
What is the order of decreasing size of the bond angles x, y and z?
largest
6
smallest
A
x
y
z
B
x
z
y
C
y
z
x
D
z
y
x
Which of the following statements explains why atmospheric nitrogen, N2, is so
chemically unreactive at room temperature?
A
The first ionisation energy of nitrogen is relatively high.
B
Nitrogen has a high electronegativity.
C
The N≡N bond requires a large amount of energy to break.
D
Diatomic nitrogen has a simple molecular structure.
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JC1 BT/2012/9647/01
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4
7
The diagram shows a liquid flowing from a burette and a charged rod is brought close
to the flow.
Which could not be a possible identity of the liquid?
8
A
CHCl3
B C2H6
C
C2H5OH
D C2H5Br
The gecko, a small lizard, can climb up a smooth glass window. The gecko has
millions of microscopic hairs on its toes and each hair has thousands of pads at its tip.
The result is that the molecules in the pads are extremely close to the glass surface
on which the gecko is climbing.
What is the attraction between the gecko’s toe pads and the glass surface?
9
A
co-ordinate bonds
B
covalent bonds
C
ionic bonds
D
van der Waals’ forces
Which one of the following structural features is common to both diamond and
graphite?
A
A carbon-carbon bond length equal to that in ethane.
B
Covalent bonds between carbon atoms.
C
Presence of delocalised electrons.
D
Each carbon atom is bonded to four others.
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JC1 BT/2012/8872/01
5
10
Chlorine is a pungent gas which causes severe irritation to the eyes and respiratory
system. The maximum safe tolerance level of chlorine gas in air is 0.005 mg dm−3.
How many chlorine molecules are there in 1 dm3 of air at this tolerance level?
A
C
11
0.005
× 71
B
0.005
× 6 × 10 23
71
0.005 1
× × 6 × 10 23
1000 71
D
0.005
× 71× 6 × 10 23
1000
6 × 10
23
In 1892, Lord Rayleigh made 'atmospheric nitrogen' by removing carbon dioxide,
water vapour and oxygen from a sample of air. He found the density of this nitrogen
to be 1.2572 g dm-3 at s.t.p. Chemically pure nitrogen has a density of 1.2505 g dm-3
at s.t.p.
Which gas present in 'atmospheric nitrogen' caused this discrepancy?
A
argon
B
helium
C
methane
D
neon
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6
12
The hardness present in a water sample due to dissolved calcium ions can be
determined by using an ion exchange column in the diagram.
A 50 cm3 sample of a solution containing calcium sulfate was passed through the ionexchange resin. The calcium ions in the sample were quantitatively exchanged by
hydrogen ions. The acidic sample collected in the flask required 25 cm3 of
1.0 × 10−2 mol dm-3 potassium hydroxide solution for complete neutralisation.
What was the concentration of the calcium sulfate in the original sample?
A
2.5 × 10−3 mol dm−3
B
1.0 × 10−2 mol dm−3
C
2.0 × 10−2 mol dm−3
D
4.0 × 10−2 mol dm−3
© YJC Chemistry Unit
JC1 BT/2012/8872/01
7
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
A
1, 2 and 3
are correct
B
1 and 2 only
are correct
C
2 and 3 only
are correct
D
1 only is
correct
No other combination of statements is used as a correct response.
13
The noble gas argon was considered unreactive until the compound ‘hydrogen argon
fluoride’ was produced in the year 2000. This leaves just two noble gases, neon and
helium, for which no compounds were made.
Why is it more difficult to form compounds from the noble gas neon at the top of
Group 0 than from, say, xenon?
14
1
Electrons in atoms of neon are less well-shielded than those of xenon.
2
Xenon has low-lying d orbitals but neon does not.
3
Neon has a smaller nuclear charge than xenon.
The Group II metals have higher melting points than the Group I metals.
Which factors could contribute towards the higher melting points?
15
1
Group II metals have higher first ionisation energies than Group I metals.
2
Two valence electrons are available from each Group II metal atom for bonding
in the metallic lattice.
3
There are smaller inter-ionic distances in the metallic lattices of Group II metals.
In an experiment, 10 cm3 of an organic compound in the gaseous state were sparked
with an excess of oxygen, 20 cm3 of carbon dioxide and 5 cm3 of nitrogen gas were
obtained among the products. All gas volumes were measured at the same
temperature and pressure.
Which of the following molecular formulae would fit these data?
1
C2H7N
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2
C2H6N2
JC1 BT/2012/9647/01
3
C3H7N2
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