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A-LevelChemistryAnalytical techniquesOct/Nov 2020Paper 4 Q99 Marks

The proton NMR spectrum of compound E in the solvent CDCl3 is shown. The molecular formula of compound E is C9H10O2. [Figure of proton NMR spectrum, with relative integral values of 3, 2, 2, and 5 for peaks from right to left (low to high δ) respectively. Small peak at δ=0 is TMS.]

Q: What topic does this question test?

This question tests Analytical techniques in A-Level Chemistry (syllabus code 9701). It is worth 9 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 Analytical techniques in A-Level Chemistry (syllabus code 9701). It is worth 9 marks.

Source

This question appeared in the Cambridge A-Level Chemistry Oct/Nov 2020 examination, Paper 4 Variant 1.

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