A-LevelChemistryCarboxylic acids and derivativesOct/Nov 2016Paper 1 Q261 Mark

Ethane-1,2-diol, HOCH₂CH₂OH, reacts with an excess of ethanoic acid, CH₃CO₂H, in the presence of an acid catalyst. A compound is formed with the molecular formula C₆H₁₀O₄. What is the structure of this compound?

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

The correct answer is C: CH₃CO₂CH₂CH₂OCOCH₃.

Q: What topic does this question test?

This question tests Carboxylic acids and derivatives in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

ACH₃OCOCH₂CH₂CO₂CH₃

BCH₃CO₂CH₂CH₂CO₂CH₃

CCH₃CO₂CH₂CH₂OCOCH₃

DHOCH₂CH₂COCH₂OCOCH₃

✓ Correct Answer

The correct answer is C: CH₃CO₂CH₂CH₂OCOCH₃

📋 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 Carboxylic acids and derivatives in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

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

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