IGCSE Co-ordinated Sciences (Double Award) 0654 · Chemistry · 120

0654.C10.2.03 — State the adverse effect of these air pollutants, limited to: (a). carbon dioxide: higher levels of carbon dioxide leading to increased glob: past paper questions

5 real questionsasked in 1 of the last 10 exam series2019–2025usually: Which, State, Explain, Complete

Real questions on 0654.c10.2.03 — state the adverse effect of these air pollutants, limited to: (a). carbon dioxide: higher levels of carbon dioxide leading to increased glob

The newest 5 of 5 written questions. Open one to see it on the real paper.

0654/41 · October/November 2025 · Q6c(i)[1]
State one adverse effect of oxides of nitrogen.
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0654/41 · October/November 2025 · Q6c(ii)[2]
Explain how oxides of nitrogen form in petrol car engines.
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0654/41 · October/November 2025 · Q6c(iii)[2]
Oxides of nitrogen and carbon monoxide are removed from a car engine by a catalytic converter. Complete the balanced symbol equation for the reaction that takes place.
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0654/11 · October/November 2020 · Q24[1]
Which gas is an acidic pollutant in air?
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0654/21 · May/June 2019 · Q24[1]
Which processes lead to the formation of a greenhouse gas?
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What examiners said

Candidates chose the incorrect B more often than the correct answer, C. They should know that whilst carbon dioxide is weakly acidic, carbon monoxide is not.
— Examiner report, October/November 2020, 0654/11 Q24 (Cambridge)

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In the syllabus

120 0654.C10.2.03 — State the adverse effect of these air pollutants, limited to: (a). carbon dioxide: higher levels of carbon dioxide leading to increased glob

State the adverse effect of these air pollutants, limited to: (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 of methane leading to increased global warming, which leads to climate change (e). oxides of nitrogen: acid rain and respiratory problems (f). sulfur dioxide: acid rain

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