1.

Direction iodination of benzene is not possible because

Answer»

iodine is oxidising agent
the PRODUCT `C_6H_5I`reduced to `C_6H_6`by HI
HI is UNSTABLE
RING is deactivated

Solution :Aryl halides are less reactive towards nucleophilc substitution than alkyl halides due to PARTIAL double bond character obtained by resonance.


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