The product $(A)$ of the given reaction is:

Assertion : Nitrobenzene is used as a solvent in Friedel-Craft's reaction.
Reason : Fusion of nitrobenzene with solid $KOH$ gives a low yield of a mixture of $o-$ and $p-$ nitrophenols.

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

Aryl halides are extremely less reactive towards nucleophilic substitution. Predict and explain the order of reactivity of the following compounds towards nucleophilic substitution:
$(I)$ $p$-nitrochlorobenzene
$(II)$ $2,4$-dinitrochlorobenzene
$(III)$ $2,4,6$-trinitrochlorobenzene

Which catalyst is used in the Friedel-Crafts reaction?

Identify the suitable reagents for the conversion of benzene to fluorobenzene.