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A-LevelChemistryReaction kineticsOct/Nov 2022Paper 4 Q210 Marks

Nitrogen monoxide, NO, reacts with ozone, O₃. NO(g) + O₃(g) → NO₂(g) + O₂(g) This reaction is first order with respect to both NO and O₃. At 298 K, the rate constant k = 11500 mol⁻¹ dm³ s⁻¹.

Q: What topic does this question test?

This question tests Reaction kinetics in A-Level Chemistry (syllabus code 9701). It is worth 10 marks.

📋 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 structured question tests Reaction kinetics in A-Level Chemistry (syllabus code 9701). It is worth 10 marks.

Source

This question appeared in the Cambridge A-Level Chemistry Oct/Nov 2022 examination, Paper 4 Variant 2.

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