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Air quality and climate past paper questions

O Level Chemistry 5070 · Chemistry of the environment. 1 State the composition of clean, dry air as approximately 78% nitrogen, N2, 21% oxygen, O2, and the remainder as a mixture of noble gases and carbon dioxide, CO2 2 State the source of each of these air pollutants: (a) carbon dioxide from the complete combustion of carbon-containing fuels (b) carbon monoxide and particulates from the incomplete combustion of carbon-containing fuels (c) methane from the decomposition of vegetation and waste gases from digestion in animals (d) oxides of nitrogen from car engines (e) sulfur dioxide from the combustion of fossil fuels which contain sulfur compounds 3 State the adverse effects of these air pollutants: (a) carbon dioxide: higher levels of carbon dioxide leading to increased global warming, which leads to climate change (b) carbon monoxide: toxic gas (c) particulates: increased risk of respiratory problems and cancer (d) methane: higher levels

In Cambridge O Level Chemistry 5070, Air quality and climate came up in 42 of the 72 papers on Paperstreak, for about 3 marks a paper when it does. It last came up in October/November 2025.

Often set with Formulae, Simple molecules and covalent bonds, The mole and the Avogadro constant, The characteristic properties of acids and bases.

57 questions, newest first

  1. 5070/11/O/N/25 Question 29 · 1 mark
  2. 5070/12/O/N/25 Question 29 · 1 mark
  3. 5070/21/O/N/25 Question 10 · 5 marks
  4. 5070/11/M/J/25 Question 30 · 1 mark
  5. 5070/11/M/J/25 Question 31 · 1 mark
  6. 5070/12/M/J/25 Question 31 · 1 mark
  7. 5070/21/M/J/25 Question 5 parts (b(i)) (b(ii)) · 4 marks
  8. 5070/22/M/J/25 Question 5 parts (a(ii)) (b(i)) · 2 marks
  9. 5070/11/O/N/24 Question 30 · 1 mark
  10. 5070/12/O/N/24 Question 33 · 1 mark
  11. 5070/21/O/N/24 Question 6 parts (e(i)) (e(ii)) · 3 marks
  12. 5070/22/O/N/24 Question 2 part (a(ii)) · 1 mark
  13. 5070/21/M/J/24 Question 6 · 7 marks
  14. 5070/22/M/J/24 Question 6 · 7 marks
  15. 5070/11/O/N/23 Question 31 · 1 mark
  16. 5070/12/O/N/23 Question 32 · 1 mark
  17. 5070/21/O/N/23 Question 1 parts (a) (c) · 2 marks
  18. 5070/21/O/N/23 Question 6 part (a(i)) · 1 mark
  19. 5070/21/O/N/23 Question 7 parts (e(i)) (e(ii)) · 2 marks
  20. 5070/22/O/N/23 Question 1 parts (a) (d) · 2 marks
  21. 5070/22/O/N/23 Question 6 parts (b(i)) (b(ii)) · 2 marks
  22. 5070/22/O/N/23 Question 7 parts (e(i)) (e(ii)) · 3 marks
  23. 5070/11/M/J/23 Question 32 · 1 mark
  24. 5070/12/M/J/23 Question 33 · 1 mark
  25. 5070/21/M/J/23 Question 9 parts (c) (d) · 2 marks
  26. 5070/21/M/J/23 Question 10 part (b(i)) · 1 mark
  27. 5070/22/M/J/23 Question 9 parts (c(i)) (c(ii)) (d) · 4 marks
  28. 5070/11/O/N/22 Question 34 · 1 mark
  29. 5070/21/O/N/22 Question 2 part (b(i)) · 1 mark
  30. 5070/21/O/N/22 Question 3 part (d) · 1 mark
  31. 5070/21/O/N/22 Question 6 part (b(ii)) · 1 mark
  32. 5070/22/O/N/22 Question 1 part (c) · 1 mark
  33. 5070/22/O/N/22 Question 6 parts (a) (d(i)) (d(ii)) · 3 marks
  34. 5070/11/M/J/22 Question 33 · 1 mark
  35. 5070/12/M/J/22 Question 33 · 1 mark
  36. 5070/21/M/J/22 Question 6 part (a) · 1 mark
  37. 5070/22/M/J/22 Question 7 parts (a) (b) · 2 marks
  38. 5070/11/O/N/21 Question 35 · 1 mark
  39. 5070/21/O/N/21 Question 1 part (e) · 1 mark
  40. 5070/21/O/N/21 Question 2 parts (a) (e(ii)) (f) · 3 marks
  41. 5070/22/O/N/21 Question 2 parts (a) (c) (d) (e) · 8 marks
  42. 5070/11/M/J/21 Question 17 · 1 mark
  43. 5070/11/M/J/21 Question 34 · 1 mark
  44. 5070/21/M/J/21 Question 5 part (b) · 1 mark
  45. 5070/21/M/J/21 Question 6 parts (a(i)) (a(ii)) · 2 marks
  46. 5070/22/M/J/21 Question 2 parts (a) (b) · 2 marks
  47. 5070/22/M/J/21 Question 6 parts (a) (b) (c(i)) · 3 marks
  48. 5070/11/O/N/20 Question 32 · 1 mark
  49. 5070/12/O/N/20 Question 26 · 1 mark
  50. 5070/12/O/N/20 Question 32 · 1 mark
  51. 5070/21/O/N/20 Question 1 part (e) · 1 mark
  52. 5070/21/O/N/20 Question 8 part (c) · 1 mark
  53. 5070/22/O/N/20 Question 1 part (d) · 1 mark
  54. 5070/11/M/J/20 Question 31 · 1 mark
  55. 5070/12/M/J/20 Question 31 · 1 mark
  56. 5070/21/M/J/20 Question 7 part (a) · 1 mark
  57. 5070/22/M/J/20 Question 9 part (a) · 1 mark

More in Chemistry of the environment: Water, Fertilisers.

Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.