Triaminobenzene is a

The reaction of $RCONH_2$ with bromine and $KOH$ gives $RNH_2$ as the end product. Which one of the following is the intermediate product formed in this reaction?

Which isomeric amine has the lowest boiling point?

Given below are two statements:
Statement $I$: Aniline does not undergo Friedel-Crafts alkylation reaction.
Statement $II$: Aniline cannot be prepared through Gabriel synthesis.
In the light of the above statements,choose the correct answer from the options given below:

Which of the following compounds does not evolve $N_2$ gas upon reaction with $HNO_2$?

In the following sequence of reactions:
$C_6H_5-NH_2$ $\xrightarrow[HCl]{NaNO_2} A$ $\xrightarrow{CuCN} B$ $\xrightarrow{H_2/Ni} C$ $\xrightarrow{HNO_2} D$
Product $(D)$ would be: