CAIE A Level Chemistry 9701 · Halogen compounds
Explain why primary halogenoalkanes tend to undergo nucleophilic substitution via an mechanism, whereas tertiary halogenoalkanes tend to undergo nucleophilic substitution via an mechanism. In your answer, refer to the inductive effect of alkyl groups.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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