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Aromatic compounds

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Question 4

Which statement(s) support(s) the delocalised model for the structure of benzene over the Kekulé structure (cyclohexa-1,3,5-triene)?

  1. All six carbon–carbon bonds have the same length of 0.139 nm0.139\text{ nm}0.139 nm.
  2. Benzene rapidly decolourises bromine water at room temperature via an addition reaction.
  3. The enthalpy change of hydrogenation of benzene is significantly less exothermic than predicted for a localized triene system.
A

1, 2 and 3

B

Only 1 and 3

C

Only 2 and 3

D

Only 1

Markscheme

Aromatic compounds Questions

  1. A Level
  2. /Chemistry
  3. /Aromatic compounds

14 exam-style questions on OCR A A Level Chemistry Aromatic compounds. Each one has a worked solution and a mark scheme showing where the marks go.

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