A-LevelChemistryHalogen derivatives9701/12 · May/June 2018 · Q241 Mark

Structural isomerism and stereoisomerism should be considered when answering this question. A colourless liquid, C5H11Cl, exists as a mixture of two optical isomers. When heated with sodium hydroxide in ethanol, a mixture of only two alkenes is formed. What could the colourless liquid be?

A(CH3CH2)2CHCl

BCH3CH2CH2CHClCH3

C(CH3)2CHCHClCH3

DCH3CH2CCl(CH3)2

✓ Correct answer

C: (CH3)2CHCHClCH3

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Topic: Halogen derivatives, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2018 Paper 1 Variant 2, question 24.

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