$DDT$ can be prepared by reacting chlorobenzene (in the presence of conc. $H_2SO_4$) with

Aryl halide is less reactive than alkyl halide towards nucleophilic substitution because

Chlorination of toluene in the presence of ferric chloride gives........

Assertion : $p-$nitroacetophenone $(p-O_2N-C_6H_4-COCH_3)$ is prepared by Friedel-Crafts acylation of nitrobenzene.
Reason : Nitrobenzene easily undergoes electrophilic substitution reaction.

The major product formed in the Friedel-Crafts acylation of chlorobenzene is $p-$chloroacetophenone. Identify the correct structure of the major product.

In which reaction does nitrobenzene give $o$- and $p$-substituted products?