How many primary amines are possible for the molecular formula $C_4H_{11}N$?

Which of the following yields a primary amine upon acidic hydrolysis?

Aniline is not the major product in one of the following reactions. Identify that reaction.

What will be the major product in the given reaction?

How can ethylamine be prepared?

An organic compound $A$ on reaction with $NH_{3}$ followed by heating gives compound $B$. Which on further strong heating gives compound $C$ $(C_{8}H_{5}NO_{2})$. Compound $C$ on sequential reaction with ethanolic $KOH$,alkyl chloride and hydrolysis with alkali gives a primary amine. The compound $A$ is.