A-LevelChemistryNitrogen and sulfurOct/Nov 2022Paper 1 Q241 Mark

Photochemical smog is a type of air pollution produced in urban areas by the effect of sunlight on substances released from vehicle exhausts. Which mixture of primary pollutants leads to the formation of photochemical smog?

Q: What topic does this question test?

This question tests Nitrogen and sulfur in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Acarbon dioxide and water vapour

Bcarbon monoxide and unburnt hydrocarbons

Cnitrogen oxide and unburnt hydrocarbons

Dsulfur dioxide and water vapour

✓ Correct Answer

The correct answer is C: nitrogen oxide and unburnt hydrocarbons

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Chemistry Question

Topic

This multiple-choice question tests Nitrogen and sulfur in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Oct/Nov 2022 examination, Paper 1 Variant 2.

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