Short answer·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
Explain why benzene generally favours electrophilic substitution over addition.
Total: 3 marks
(a) State the structural feature responsible for benzene stability. (1 mark)
(b) Explain what addition would do to this feature. (1 mark)
(c) Explain why substitution is preferred. (1 mark)
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