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A-LevelChemistryCarbonyl compoundsFeb/Mar 2023Paper 2 Q321 Marks

Alkenes undergo an addition reaction with a 1:1 mixture of CO and H₂ to form aldehydes. Fig. 3.1 shows the reaction of propene with a 1:1 mixture of CO and H2. [Fig. 3.1]

Q: What topic does this question test?

This question tests Carbonyl compounds in A-Level Chemistry (syllabus code 9701). It is worth 21 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 Carbonyl compounds in A-Level Chemistry (syllabus code 9701). It is worth 21 marks.

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2023 examination, Paper 2 Variant 2.

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