1.

Chlorination of benzene is not possible in the following reaction

Answer»

`C_6H_6+Cl_2 overset(FeCl_3)to`
`C_6H_6+HOCl overset(H^+)to`
`C_6H_6+I - Cloverset(ZnCl_2)to`
`C_6H_6+Cl_2 overset(AlCl_3)to`

SOLUTION :REACTION is CALLED Gattermann-Koch synthesis, which is carried by catalyst `AlCl_3`


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