A-LevelChemistryCarbonyl compoundsFeb/Mar 2016Paper 1 Q201 Mark

People who take statin drugs to control their blood cholesterol may also take 'coenzyme Q₁₀'. [Figure showing a simplified structure of one form of this coenzyme.] Which row describes this structure correctly?

Q: What is the correct answer to this A-Level Chemistry question?

The correct answer is D: ketone, n+4.

Q: What topic does this question test?

This question tests Carbonyl compounds in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Aan aldehyde, n+2

Ban aldehyde, n+4

Cketone, n+2

Dketone, n+4

✓ Correct Answer

The correct answer is D: ketone, 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 Carbonyl compounds in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2016 examination, Paper 1 Variant 2.

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