Identify the major product obtained in the following reaction.
Chlorobenzene $\xrightarrow[\text{Anhydrous } FeCl_3]{Cl_2}$ major product

Which of the following reactions does not result in the chlorination of benzene?

The decreasing order of reactivity of the given compounds towards nucleophilic substitution with aqueous $NaOH$ is:
$(I)$ $1$-bromo-$3$-nitrobenzene
$(II)$ $1$-bromo-$2,4,6$-trinitrobenzene
$(III)$ $1$-bromo-$4$-nitrobenzene
$(IV)$ $1$-bromo-$2,4$-dinitrobenzene

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.

Identify the incorrect match in the following reactions:

Identify the major product formed when $p$-isopropyltoluene (also known as $p$-cymene) reacts with a mixture of concentrated $HNO_3$ and concentrated $H_2SO_4$.