A-LevelChemistryNitrogen and sulfurOct/Nov 2024Paper 1 Q41 Mark

A reaction between two gases takes place on the surface of the catalytic converter of a petrol-engined car. In this reaction, four reactant molecules produce three product molecules. What could be the two reactant gases in this reaction?

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.

Anitrogen and carbon dioxide

Bnitrogen monoxide and carbon dioxide

Cnitrogen monoxide and carbon monoxide

Dnitrogen dioxide and carbon monoxide

✓ Correct Answer

The correct answer is C: nitrogen monoxide and carbon monoxide

📋 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 2024 examination, Paper 1 Variant 2.

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