A-LevelChemistryCarbonyl compounds9701/12 · May/June 2025 · Q311 Mark

Butan-2-one reacts with alkaline I2(aq). An excess of dilute sulfuric acid is then added to the reaction mixture. The organic products of this reaction sequence are triiodomethane and product M. What is product M?

Aethanoate ion

Bethanoic acid

Cpropanoate ion

Dpropanoic acid

✓ Correct answer

D: propanoic acid

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Topic: Carbonyl compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2025 Paper 1 Variant 2, question 31.

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