CAIE A Level Chemistry 9701 · Halogen compounds
Chloroethane reacts readily with aqueous sodium hydroxide to form ethanol. Chlorobenzene does not react with aqueous sodium hydroxide under the same conditions.
Suggest why chlorobenzene is much less reactive than chloroethane towards nucleophilic substitution.
6 marks, so the mark scheme is looking for about 6 separate creditworthy points. Making the same point twice in different words earns it once.
Suggest means: Apply what you know to an unfamiliar situation. There may be more than one acceptable answer. Reason from the principle you have learned to the new context, and say which principle you are using.
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