A-LevelChemistryOrganic synthesisOct/Nov 2010Paper 1 Q271 Mark

Part of the structure of strobilurin, a fungicide, is shown. R and R' are inert groups. [Figure showing part of strobilurin structure] If strobilurin is first warmed with aqueous sulfuric acid, and its product then treated with hydrogen in the presence of a palladium catalyst, what could be the structure of the final product?

Q: What topic does this question test?

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

A[Diagram A showing chemical structure]

B[Diagram B showing chemical structure]

C[Diagram C showing chemical structure]

D[Diagram D showing chemical structure]

✓ Correct Answer

The correct answer is A: [Diagram A showing chemical structure]

📋 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 Organic synthesis in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Oct/Nov 2010 examination, Paper 1 Variant 2.

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