Exam (elaborations)
AS & A Level CHEMISTRY 9701/12 Paper 1 Multiple Choice May/June 2023 Authentic Marking Scheme
AS & A Level CHEMISTRY 9701/12 Paper 1 Multiple Choice May/June 2023 Authentic Marking Scheme
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, 2
35 +
1 When chlorine gas is analysed in a mass spectrometer Cl ions are detected.
Which row is correct?
number of electronic
35 + 35 +
neutrons in Cl configuration of Cl
2 2 6 2 4
A 17 1s 2s 2p 3s 3p
2 2 6 2 6
B 17 1s 2s 2p 3s 3p
2 2 6 2 4
C 18 1s 2s 2p 3s 3p
2 2 6 2 6
D 18 1s 2s 2p 3s 3p
2 Which species is a free radical?
– 2–
A He B Be C O D Zn
3 Which statement is correct?
A The first ionisation energy of chlorine is more than the first ionisation energy of argon.
B The second ionisation energy of calcium is more than the second ionisation energy of
magnesium.
C The second ionisation energy of sulfur is equal to the first ionisation energy of phosphorus.
D The eighth ionisation energy of chlorine is more than the first ionisation energy of neon.
4 If 1 mole of hexane combusts in an excess of oxygen, how many moles of products are formed?
A 11 B 12 C 13 D 14
5 Separate samples, each of mass 1.0 g, of the compounds listed are treated with an excess of dilute
acid.
Which compound releases the largest amount of CO2?
A 1.0 g CaCO3 B 1.0 g Li2CO3 C 1.0 g MgCO3 D 1.0 g Na2CO3
6 Which statement about the Cl –N=O molecule is correct?
A EachmoleculecontainsoneSandtwoPbonds.
B It is a non-polar molecule.
C It is a linear molecule.
2
D The nitrogen atom is sp hybridised .
8&/(6
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, 3
7 Which row is correct?
total number of pairs of electrons in
molecule shape
the valence shell of the central atom
A CO2 linear two
B BF3 trigonal planar three
C NH3 regular tetrahedral four
D PF5 octahedral six
–3 3 5
8 Thevolumeofavesselis1.20s 10 m .Itcontainspureargonatapressureof1.00s 10 Pa,
andatatemperatureof25.0°C.Undertheseconditionsitcanbeassumedthatargonbehavesas
anidealgas.
Which mass of argon does it contain?
A 0.0485 g B 1.93 g C 10.4 g D 23.0 g
3 –3 –3
9 A student mixed 25.0 cm of 4.00 mol dm hydrochloric acid with an equal volume of 4.00 mol dm
sodium hydroxide. The initial temperature of both solutions was 15.0 °C. The maximum temperature
–1 –1
recorded was 30.0 °C. The heat capacity of the final solution can be assumed to be 4.18 J K g
–3
and the density of this solution can be assumed to be 1.00 g cm .
Using these results, what is the enthalpy change of neutralisation of hydrochloric acid?
–1
A –62.7 kJ mol
–1
B –31.4 kJ mol
–1
C –15.7 kJ mol
–1
D –3.14 kJ mol
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