Q. 204.2( 13 Votes )

Assertion: Aryl h

Answer :

The electron pairs on halogen atom of aryl halides are in conjugation with the benzene ring. This causes delocalisation of electrons on C-X bond (where X is a halogen) due to which a partial double bond character arises from the resonance structures given below. As a result bond cleavage is difficult, making it hard for the substituent to react. Thus these aryl halides very less reactive towards nucleophilic substitution reactions.

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