A-LevelChemistryHydrocarbons9701/12 · Oct/Nov 2025 · Q281 Mark

Pent-2-ene is reacted with cold, dilute, acidified manganate(VII) ions. What is the major product?

ACH3CH2CH(OH)CH(OH)CH3

BCH3CH2COCOCH3

Cmixture of CH3CH2CH(OH)CH2CH3 and CH3CH2CH2CH(OH)CH3

DCH3CH2COOH and CH3COOH

✓ Correct answer

A: CH3CH2CH(OH)CH(OH)CH3

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Topic: Hydrocarbons, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2025 Paper 1 Variant 2, question 28.

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