$Ph-NO_2 + Et-Cl \xrightarrow{AlCl_3} (A)$,Product $(A)$ of the given reaction is

Explain the mechanism of nucleophilic substitution reaction of ortho and para nitrohaloarenes.

The catalyst used in Raschig's process is

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

Which of the following reactions is a Fittig reaction?

Rank the following compounds in order of decreasing rate of reaction with alkoxide ion $(CH_3CH_2O^{-})$ in a nucleophilic aromatic substitution reaction:
$1$. $1$-bromo-$2$-nitrobenzene
$2$. $1$-bromo-$3$-nitrobenzene
$3$. $1$-bromo-$2,4$-dinitrobenzene
$4$. $1$-bromo-$3,4$-dinitrobenzene