Amine compounds exhibit ............ isomerism.

The major product $Z$ formed in the following sequence of reactions is:

The major products $P$ and $Q$ formed in the following reactions of benzonitrile are

Which one of the following methods is neither meant for the synthesis nor for separation of amines?

What is the major product of the following reaction? $C_2H_5-CONH_2$ $\xrightarrow{Br_2 / KOH} A$ $\xrightarrow{CHCl_3 / KOH} \text{Major Product}$

An organic compound $A$ on reduction gives compound $B$,which on reaction with trichloromethane and caustic potash forms $C$. The compound $C$ on catalytic reduction gives $N$-methylbenzenamine. The compound $A$ is,