CAIE A Level Chemistry 9701 · Halogen compounds
A student is given a sample of 2-chloro-2-methylpropane, . Explain why this compound is classified as a tertiary halogenoalkane, and state the mechanism by which it is most likely to undergo nucleophilic substitution, giving a reason for your choice.
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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