Identify $'X'$ in the following sequence of reaction:
$C_6H_5N_2^+Cl^-$ $\xrightarrow{CuCN/KCN} P$ $\xrightarrow{LiAlH_4} Q$ $\xrightarrow{HNO_2} X$

Tertiary amines have the lowest boiling points among isomeric amines because,

Identify $X$ and $Y$ in the following reactions:

Identify the correct statements:
$(A)$ Primary amines do not give diazonium salts when treated with $NaNO_2$ in acidic conditions.
$(B)$ Aliphatic and aromatic primary amines on heating with $CHCl_3$ and ethanolic $KOH$ form carbylamines.
$(C)$ Secondary and tertiary amines also give the carbylamine test.
$(D)$ Benzenesulfonyl chloride is known as Hinsberg's reagent.
$(E)$ Tertiary amines react with benzenesulfonyl chloride very easily.
Choose the correct answer from the options given below:

By reduction of nitrosobenzene,which of the following is not obtained?

Which of the following reactions does $NOT$ involve the replacement of the diazonium group?