A-LevelChemistryHalogen derivatives9701/12 · May/June 2010 · Q261 Mark

When an isomer Y of molecular formula C4H9Br undergoes hydrolysis in aqueous alkali to form an alcohol C4H9OH, the rate of reaction is found to be unaffected by changes in the concentration of OH⁻ ions present. Which is the most likely molecular structure of Y?

ACH3CH2CH2CH2Br

BCH3CH2CHBrCH3

C(CH3)2CHCH2Br

D(CH3)3CBr

✓ Correct answer

D: (CH3)3CBr

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Topic: Halogen derivatives, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2010 Paper 1 Variant 2, question 26.

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