Which compound is formed when chlorobenzene is heated with chloral in the presence of concentrated sulfuric acid?

What is $A$ in the following reaction?
Benzyl chloride + $Cl_2 \xrightarrow{FeCl_3} A + \text{p-chlorobenzyl chloride}$

Identify the products $A$ and $E$ in the following reaction sequence:

Arrange the following compounds in increasing order of their dipole moment:
$(I)$ Toluene
$(II)$ $m$-Dichlorobenzene
$(III)$ $o$-Dichlorobenzene
$(IV)$ $p$-Dichlorobenzene

$A$ mixture of $1 \, mol$ of benzene and $1 \, mol$ of nitrobenzene is reacted with $1 \, mol$ of acetyl chloride in the presence of $AlCl_3$. The major product$(s)$ is/are

Identify the product formed from chlorobenzene on heating with conc. $HNO_3$ in the presence of conc. $H_2SO_4$.