A-LevelChemistryCarboxylic acids and derivatives9701/12 · Oct/Nov 2025 · Q331 Mark

HOCH2CHO is heated under reflux with an excess of acidified K2Cr2O7 until there is no further reaction. What is the final product of this reaction?

AHOOCCHO

BHOCH2COOH

CHOOCCOOH

DHOOCCH2COOH

✓ Correct answer

C: HOOCCOOH

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Topic: Carboxylic acids and derivatives, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2025 Paper 1 Variant 2, question 33.

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