A-LevelChemistryOrganic synthesisOct/Nov 2024Paper 1 Q301 Mark

X and Y are the reagents required to convert 1-bromopropane into butanoic acid. [Figure showing reaction scheme from 1-bromopropane to an intermediate via reagent X, then to butanoic acid via reagent Y] What are the correct identities of reagents X and Y?

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

The correct answer is C: KCN in C2H5OH HCl(aq).

Q: What topic does this question test?

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

ANH3 HCl(aq)

BKCN in C2H5OH NaOH(aq)

CKCN in C2H5OH HCl(aq)

DHCN NaOH(aq)

✓ Correct Answer

The correct answer is C: KCN in C2H5OH HCl(aq)

📋 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 2024 examination, Paper 1 Variant 2.

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