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Fuels past paper questions

O Level Chemistry 5070 · Organic chemistry. 1 Name the fossil fuels: coal, natural gas and petroleum 2 Name methane as the main constituent of natural gas 3 State that hydrocarbons are compounds that contain hydrogen and carbon only 4 State that petroleum is a mixture of hydrocarbons 5 Describe the separation of petroleum into useful fractions by fractional distillation 6 Describe how the properties of fractions obtained from petroleum change from the bottom to the top of the fractionating column, limited to: (a) decreasing chain length (b) higher volatility (c) lower boiling points (d) lower viscosity 7 Name the uses of the fractions as: (a) refinery gas fraction for gas used in heating and cooking (b) gasoline / petrol fraction for fuel used in cars (c) naphtha fraction as a chemical feedstock (d) kerosene / paraffin fraction for jet fuel (e) diesel oil / gas oil fraction for fuel used in diesel engines (f) fuel oil fraction for

It came up in 32 of 72 papers, for about 2 marks a paper when it does. It last came up in October/November 2025.

Often set with Alkenes, Formulae, functional groups and terminology, Alkanes, Simple molecules and covalent bonds.

33 questions, newest first

1. 5070/12/O/N/25 Question 33 · 1 mark
2. 5070/21/O/N/25 Question 6 part (c) · 1 mark
3. 5070/21/O/N/25 Question 8 parts (b) (c(i)) (c(ii)) (c(iii)) · 6 marks
4. 5070/41/O/N/25 Question 1 parts (a) (c(i)) (c(ii)) · 3 marks
5. 5070/11/M/J/25 Question 34 · 1 mark
6. 5070/21/M/J/25 Question 5 part (a) · 1 mark
7. 5070/22/M/J/25 Question 5 part (a(iii)) · 3 marks
8. 5070/12/O/N/24 Question 35 · 1 mark
9. 5070/21/O/N/24 Question 4 part (c(i)) · 1 mark
10. 5070/22/O/N/24 Question 4 part (c(i)) · 1 mark
11. 5070/11/M/J/24 Question 34 · 1 mark
12. 5070/12/M/J/24 Question 34 · 1 mark
13. 5070/21/M/J/24 Question 2 part (c(i)) · 1 mark
14. 5070/22/M/J/24 Question 2 part (b(i)) · 1 mark
15. 5070/11/O/N/23 Question 35 · 1 mark
16. 5070/12/O/N/23 Question 34 · 1 mark
17. 5070/11/M/J/23 Question 35 · 1 mark
18. 5070/21/M/J/23 Question 7 part (d) · 1 mark
19. 5070/21/O/N/22 Question 2 part (c(ii)) · 1 mark
20. 5070/22/O/N/22 Question 3 parts (c(i)) (c(ii)) · 2 marks
21. 5070/22/M/J/22 Question 9 part (c) · 3 marks
22. 5070/22/O/N/21 Question 4 part (a(i)) · 1 mark
23. 5070/42/O/N/21 Question 1 parts (d) (e) · 2 marks
24. 5070/12/M/J/21 Question 16 · 1 mark
25. 5070/21/M/J/21 Question 3 parts (a(i)) (a(ii)) · 2 marks
26. 5070/22/M/J/21 Question 5 part (a) · 2 marks
27. 5070/11/O/N/20 Question 4 · 1 mark
28. 5070/12/O/N/20 Question 4 · 1 mark
29. 5070/21/O/N/20 Question 2 part (c) · 1 mark
30. 5070/22/O/N/20 Question 5 part (b(iii)) · 2 marks
31. 5070/12/M/J/20 Question 34 · 1 mark
32. 5070/21/M/J/20 Question 10 parts (a) (b) · 2 marks
33. 5070/22/M/J/20 Question 10 parts (a(i)) (a(ii)) (a(iii)) · 4 marks

More in Organic chemistry: Formulae, functional groups and terminology, Naming organic compounds, Alkanes, Alkenes, Alcohols, Carboxylic acids, Polymers.

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