A-LevelChemistryHydroxy compoundsFeb/Mar 2017Paper 1 Q271 Mark

Ethane-1,2-diol has the following structure. [Figure showing HO-CH₂-CH₂-OH]. Without breaking the C-C bond, there are five possible oxidation products. What is the total number of aldehyde groups and carboxylic acid groups in these five products?

Q: What topic does this question test?

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

A3 3

B3 4

C4 3

D4 4

✓ Correct Answer

The correct answer is D: 4 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 Hydroxy 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 2017 examination, Paper 1 Variant 2.

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