Organic compound ‘$D$’ is in the reaction sequence: Nitrobenzene $\xrightarrow[323-333 \text{ K}]{\text{Conc. } HNO_3, \text{Conc. } H_2SO_4} A \xrightarrow{Fe/HCl} B \xrightarrow[273 \text{ K}]{NaNO_2/HCl} C \xrightarrow[ -N_2]{C_2H_5OH} D + CH_3CHO + HCl$. Identify ‘$D$’.

$p-$Dichlorobenzene has a higher $m.p.$ than those of $o-$ and $m-$ isomers. Discuss.

The presence of the chlorine atom on the benzene ring makes the second substituent enter at which position?

The increasing order of nitration of the following compounds is:
$(A)$ Aniline
$(B)$ Chlorobenzene
$(C)$ Anisole
$(D)$ Toluene

What is the product of the bromination of $p$-methylacetanilide with $Br_2$ in $CS_2$?

Which among the following statements is true about the reactivity of haloarenes towards nucleophilic substitution reactions?
$1$. Haloarenes are very reactive towards nucleophilic substitution reaction.
$2$. In haloarenes,the $C-X$ bond acquires partial double bond character.
$3$. The $C-X$ bond in haloarenes is longer than the $C-X$ bond in haloalkanes.
$4$. In haloarenes,the phenyl cation formed as a result of self-ionisation is stable.