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GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
H
Chemistry Paper 2H
Tuesday 13 June 2023Morning Time allowed: 1 hour 15 minutes
2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2H Chemistry
For Examiner’s Use
Paper 2H Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]
Materials
Question Mark
For this paper you must have:
• a ruler 1
• a scientific calculator 2
• the periodic table (enclosed). 3
4
Instructions
• Use black ink or black ball-point pen. 5
• Pencil should only be used for drawing. 6
• Fill in the boxes at the top of this page.
TOTAL
• Answer all questions in the spaces provided.
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s).
• Do all rough work in this book. Cross through any work you do not want to be
marked.
• In all calculations, show clearly how you work out your answer.
Information
• The maximum mark for this paper is 70.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear presentation in your answers.
*JUN238464C2H01*
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
*02*
IB/M/Jun23/8464/C/2H
, 3
Do not write
outsiide the
0 1The combustion of fuels is a source of atmospheric pollutants. box
0 1 . 1 Methane is a fuel.
Balance the equation for the combustion of methane.
[1 mark]
CH4 + O2 → CO2 + H 2O
0 1 . 2 Many fuels are mixtures.
Petrol and diesel are mixtures of hydrocarbons.
Table 1 shows properties of petrol and of diesel.
Table 1
Petrol Diesel
Range of number of carbon atoms in
4 to 12 12 to 20
a hydrocarbon molecule
Range of boiling points in °C 40 to 205 250 to 350
Compare the properties of petrol and diesel.
Use Table 1.
[2 marks]
Turn over ►
*03*
IB/M/Jun23/8464/C/2H
, 4
Do not write
outside the
0 1 . 3 The gases released when a fuel is burned in car engines may include: box
• oxides of nitrogen
• carbon monoxide
• water vapour.
Which chemical element do all these gases contain?
[1 mark]
✓
Tick ( ) one box.
Carbon
Hydrogen
Nitrogen
Oxygen
0 1 . 4 When diesel burns in car engines, oxides of nitrogen are produced.
Where does the nitrogen come from?
[1 mark]
0 1 . 5 When diesel burns, particulates may be produced.
What environmental effect do particulates from burning diesel cause?
[1 mark]
*04*
IB/M/Jun23/8464/C/2H
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