The most appropriate product for the following reaction is:

Identify products $A$ and $B$ in the following reaction scheme:
Reaction $1$: Benzene + $Cl_2$ (excess) $\xrightarrow{FeCl_3}$ $A$
Reaction $2$: Benzene + $Cl_2$ (excess) $\xrightarrow{h\nu}$ $B$

Benzene vapour mixed with air when passed over $V_2O_5$ catalyst at $775 \ K$ gives

Which of the following compounds is not aromatic?

In the following reaction,$X, Y$ and $Z$ are

Which of the following statements are correct?
$I$. In nitrating mixture,nitric acid participates as an acid.
$II$. $\sigma$-complex is the intermediate substance in electrophilic substitution of benzene.
$III$. Benzene on Friedel-Crafts alkylation with $n$-propyl chloride gives isopropyl benzene.