The major product of the reaction is

$A$ hydrocarbon $A$ $(C_{4}H_{8})$ on reaction with $HCl$ gives a compound $B$ $(C_{4}H_{9}Cl)$ which on reaction with $1 \ mol$ of $NH_{3}$ gives compound $C$ $(C_{4}H_{11}N)$. On reacting with $NaNO_{2}$ and $HCl$ followed by treatment with water,compound $C$ yields an optically active compound $D$. The compound $D$ is

Action of $HNO_2$ on $CH_3NH_2$ gives the following as the major product:

Number of isomeric primary amines obtained from $C_4H_{11}N$ are

Aniline is purified by which of the following methods?

The major product formed in the following reaction is: