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Q.

In the electrophilic substitution of benzene, to restore aromatic character sigma complex releases proton from

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a

Any one of the carbons

b

sp hybridized carbon

c

sp2  hybridized carbon

d

sp3 hybridized carbon

answer is A.

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Detailed Solution

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  • The attack of electrophile results in the formation of σ-complex or arenium ion in which one of the carbons is sp3 hybridized.
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  • Question Image
  • To restore the aromatic character, σ -complex releases proton from sp3 hybridized carbon on attack by [AlCl4 ]– (in case of halogenation, alkylation and acylation) and [HSO4 ]– (in case of nitration)
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