A-LevelChemistryIntroduction to organic chemistryMay/June 2024Paper 1 Q331 Mark

The diagram shows a simplified structure of coenzyme Q10. [Figure 33.1: coenzyme Q10 structure] Which row describes the structure of coenzyme Q10 correctly? [Table 33.1]

Q: What topic does this question test?

This question tests Introduction to organic chemistry in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Athe coenzyme is: an aldehyde, number of π bonds in one molecule: n+2

Bthe coenzyme is: an aldehyde, number of π bonds in one molecule: n+4

Cthe coenzyme is: a ketone, number of π bonds in one molecule: n+2

Dthe coenzyme is: a ketone, number of π bonds in one molecule: n+4

✓ Correct Answer

The correct answer is D: the coenzyme is: a ketone, number of π bonds in one molecule: n+4

📋 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 Introduction to organic chemistry in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry May/June 2024 examination, Paper 1 Variant 2.

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