NEET Chemistry Substitution Reactions MCQ Question
Which of the following statements about substitution reactions of benzene is correct?
The sigma complex loses aromatic character when it forms an arenium ion.
The product of halogenation is always a fully hydrogenated benzene derivative.
Aromatic character is restored before the release of the proton in the substitution mechanism.
Chlorine can substitute in benzene without the need for ultraviolet light.
Correct Answer
Detailed Explanation
The sigma complex or arenium ion loses its aromatic character because delocalisation of electrons stops at the sp3 hybridised carbon, as stated in the context provided. Other options reflect misconceptions about the substitution mechanism.
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