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A-LevelChemistryHalogen derivativesFeb/Mar 2023Paper 1 Q271 Mark

Compound X, C7H13Br, reacts with hot alcoholic NaOH to produce two compounds, Y and Z. On reaction with Br2, Y gives a product, C7H12Br2, which exists as a mixture of four optical isomers. On reaction with Br2, Z gives a product, C7H12Br2, which is non-chiral. What could X be?

ACyclic compound with a six-membered ring, a methyl group and a bromine atom on adjacent carbons.
BCyclic compound with a six-membered ring and a bromomethyl (-CH2Br) group attached.
CCyclic compound with a six-membered ring, a methyl group and a bromine atom on the same carbon.
DCyclic compound with a six-membered ring, a bromine atom on one carbon, and two methyl groups on two other carbons.

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The correct answer is A. This question tests the candidate's understanding of halogen derivatives within the Chemistrysyllabus. The examiner's mark scheme requires...

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About This A-Level Chemistry Question

This multiple-choice question appeared in the Cambridge A-Level Chemistry (9701) Feb/Mar 2023 examination, Paper 1 Variant 2. It tests the topic of Halogen derivatives and is worth 1 mark.

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