A-LevelChemistryHalogen derivativesOct/Nov 2018Paper 1 Q381 Mark
Halogenoalkanes can undergo reaction with hydroxide ions. RBr + OH⁻ → ROH + Br⁻ The reaction of some halogenoalkanes proceeds by the SN1 mechanism. Which statements about the SN1 mechanism are correct? 1 A carbocation is formed which is stabilised by the inductive effect of the alkyl groups present. 2 Only tertiary halogenoalkanes are hydrolysed in this way. 3 The intermediate formed includes a carbon atom with five bonds attached to it.
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
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The correct answer is D. This question tests the candidate's understanding of halogen derivatives within the Chemistrysyllabus. The examiner's mark scheme requires...
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