Air quality and climate: past paper questions

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• Question 33May/June 2026, paper 11Multiple choice1 markHas a diagram

  Which row identifies the reactants and products of photosynthesis?

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• Question 29Oct/Nov 2025, paper 11Multiple choice1 markHas a diagram

  Which row identifies an adverse effect of the named pollutant?

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• Question 31Oct/Nov 2024, paper 11Multiple choice1 mark

  Which statement describes clean, dry air?

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• Question 30Oct/Nov 2023, paper 11Multiple choice1 mark

  What are the main products obtained by the fractional distillation of liquid air?

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• Question 29May/June 2026, paper 12Multiple choice1 markHas a diagram

  Which row identifies the source and the adverse effect of the named pollutant?

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• Question 31Oct/Nov 2025, paper 12Multiple choice1 markHas a diagram

  Clean, dry air contains nitrogen, oxygen and small amounts of other gases. The noble gases have been left out of the table. Which row shows the composition of clean, dry air?

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• Question 32Oct/Nov 2024, paper 11Multiple choice1 mark

  Which word equation describes photosynthesis?

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• Question 35Oct/Nov 2023, paper 11Multiple choice1 mark

  What is the approximate volume of nitrogen in $200{\text{ cm}}^3$ of air?

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• Question 30May/June 2026, paper 12Multiple choice1 markHas a diagram

  The percentage composition of gases on the planet Neptune is shown. | gas | percentage composition / % | |---|---| | hydrogen | 80 | | helium | 18 | | methane | 1.5 | | other gases | 0.5 | Which statement about the atmospheres on Neptune and on the Earth is correct?

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• Question 33Oct/Nov 2025, paper 12Multiple choice1 markHas a diagram

  Gas X is a waste gas from digestion in animals. Gas Y is formed when gas X is burned with an insufficient amount of oxygen. Gas Z is formed when gas X is burned with an excess of oxygen.

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• Question 33Oct/Nov 2024, paper 11Multiple choice1 mark

  Some adverse effects caused by air pollutants are listed. ● acid rain ● photochemical smog ● respiratory problems Which air pollutant contributes to all three of these adverse effects?

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• Question 2Oct/Nov 2023, paper 12Multiple choice1 mark

  Which statements about clean, dry air are correct?

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• Question 32May/June 2026, paper 13Multiple choice1 markHas a diagram

  Which diagram shows the percentage composition of clean, dry air?

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• Question 34Oct/Nov 2025, paper 12Multiple choice1 mark

  Which statement about photosynthesis is correct?

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• Question 32Oct/Nov 2024, paper 13Multiple choice1 mark

  Three effects of air pollutants are listed. 1 photochemical smog 2 respiratory problems 3 acid rain Which effects are caused by oxides of nitrogen?

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• Question 30Oct/Nov 2023, paper 12Multiple choice1 mark

  Which process removes carbon dioxide from the atmosphere?

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• Question 30May/June 2026, paper 21Multiple choice1 markHas a diagram

  Three air pollutants, $\text{X}$, $\text{Y}$ and $\text{Z}$, are described. $\text{X}$ is a toxic gas formed by the incomplete combustion of fossil fuels. $\text{Y}$ is formed by decomposing vegetation and increases global warming.

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• Question 28Oct/Nov 2025, paper 13Multiple choice1 mark

  Plants produce glucose by photosynthesis. What is essential for this process?

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• Question 26Oct/Nov 2024, paper 21Multiple choice1 mark

  Which gas is both an element and present in clean, dry air?

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• Question 33Oct/Nov 2023, paper 12Multiple choice1 mark

  What are the main substances produced by the fractional distillation of liquid air?

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• Question 29May/June 2026, paper 22Multiple choice1 mark

  What is the equation for photosynthesis?

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• Question 29Oct/Nov 2025, paper 13Multiple choice1 markHas a diagram

  Two reactions, M and N, both form carbon dioxide.

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• Question 27Oct/Nov 2024, paper 21Multiple choice1 mark

  Oxides of nitrogen formed in a car's engine are removed using a catalytic converter. What happens to the oxides of nitrogen in the catalytic converter?

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• Question 32Oct/Nov 2023, paper 13Multiple choice1 mark

  The gases from the engine of a car contain oxides of nitrogen. How are these oxides formed?

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• Question 30May/June 2026, paper 22Multiple choice1 mark

  Modern cars are fitted with catalytic converters. Which statement about the catalysts in catalytic converters is correct?

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• Question 30Oct/Nov 2025, paper 21Multiple choice1 mark

  Catalytic converters are used to remove oxides of nitrogen from exhaust gases. The equation represents one of the reactions that occur in a catalytic converter.

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• Question 33Oct/Nov 2023, paper 13Multiple choice1 mark

  Which statements explain why plastics should be recycled?

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• Question 31May/June 2026, paper 22Multiple choice1 markHas a diagram

  Which row describes a strategy for reducing global warming and a strategy for reducing acid rain?

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• Question 31Oct/Nov 2025, paper 21Multiple choice1 markHas a diagram

  Some gases are present in clean, dry air, while other gases are only present in polluted air. Which row is correct?

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• Question 27Oct/Nov 2024, paper 22Multiple choice1 markHas a diagram

  Which row identifies two greenhouse gases and three processes by which they contribute to global warming?

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