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A-LevelChemistryHydrocarbons9701/12 · Feb/Mar 2024 · Q271 Mark

But-2-ene reacts with cold dilute acidified KMnO₄ to give product X. But-2-ene reacts with hot concentrated acidified KMnO₄ to give product Y. Which statement about product X and product Y is correct?

ABoth product X and product Y will react with 2,4-dinitrophenylhydrazine.
BNeither product X nor product Y will react with 2,4-dinitrophenylhydrazine.
CProduct X will react with 2,4-dinitrophenylhydrazine, product Y will not.
DProduct Y will react with 2,4-dinitrophenylhydrazine, product X will not.

✓ Correct answer

B: Neither product X nor product Y will react with 2,4-dinitrophenylhydrazine.

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About this question

Topic
Hydrocarbons, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source
A-Level Chemistry, Feb/Mar 2024 Paper 1 Variant 2, question 27.

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