In the diazotisation of aniline with sodium nitrite and hydrochloric acid,an excess of hydrochloric acid is used primarily to

Succinic acid $\xrightarrow{\Delta } (A)$ $\xrightarrow[\Delta ]{NH_3} (B)$ $\xrightarrow[KOH]{Br_2} (C);$ Product $(C)$ will be

The sequence of reagents required to convert aniline to benzene nitrile is:

Under what reaction conditions (acidic/basic),the coupling reaction of aryldiazonium chloride with aniline is carried out?

With respect to the following reaction,consider the given statements:
$C_6H_5NH_2 \xrightarrow{HNO_3, H_2SO_4, 288 \ K} \text{products}$
$(A)$ $o$-Nitroaniline and $p$-nitroaniline are the predominant products.
$(B)$ $p$-Nitroaniline and $m$-nitroaniline are the predominant products.
$(C)$ $HNO_3$ acts as an acid.
$(D)$ $H_2SO_4$ acts as an acid.

The major product in the following reaction sequence is: