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A-LevelChemistryCarboxylic acids and derivativesMay/June 2021Paper 2 Q510 Marks

Compound X contains the same functional groups as citric acid. [Figure showing the skeletal structure of citric acid] The table describes some of the similarities and differences between citric acid and compound X. [Table with properties: chiral centre, reaction with Na, reaction with H+/Cr2O72- for citric acid and X]

Q: What topic does this question test?

This question tests Carboxylic acids and derivatives in A-Level Chemistry (syllabus code 9701). It is worth 10 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 Carboxylic acids and derivatives in A-Level Chemistry (syllabus code 9701). It is worth 10 marks.

Source

This question appeared in the Cambridge A-Level Chemistry May/June 2021 examination, Paper 2 Variant 3.

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