A-LevelChemistryOrganic synthesisOct/Nov 2021Paper 1 Q241 Mark

Butanoic acid can be made from 1-bromopropane in two stages. stage 1 CH3CH2CH2Br → CH3CH2CH2CN stage 2 CH3CH2CH2CN → CH3CH2CH2CO2H Which types of reaction are stage 1 and stage 2?

Q: What topic does this question test?

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

Aelectrophilic addition (stage 1), hydrolysis (stage 2)

Belectrophilic addition (stage 1), oxidation (stage 2)

Cnucleophilic substitution (stage 1), hydrolysis (stage 2)

Dnucleophilic substitution (stage 1), oxidation (stage 2)

✓ Correct Answer

The correct answer is C: nucleophilic substitution (stage 1), hydrolysis (stage 2)

📋 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 2021 examination, Paper 1 Variant 2.

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