A-LevelChemistryHalogen derivatives9701/12 · May/June 2025 · Q251 Mark

Which statement about the mechanism of an SN1 reaction of a halogenoalkane is correct?

Anucleophile is substituted by an electrophile.

BOne intermediate is formed from two reacting molecules.

CThe intermediate is stabilised by adjacent alkyl groups.

DThe intermediate is uncharged.

✓ Correct answer

C: The intermediate is stabilised by adjacent alkyl groups.

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Topic: Halogen derivatives, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2025 Paper 1 Variant 2, question 25.

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