The product formed when aniline is treated with chloroform in the presence of $KOH$ (alcoholic) is

Identify $Z$ in the above sequence of reactions.

Pure aniline is a

Among the following compounds $C_3H_7NH_2,$ $NH_3,$ $CH_3NH_2,$ $C_2H_5NH_2$ and $C_6H_5NH_2,$ the least basic compound is

What is formed when benzylamine reacts with nitrous acid?

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: $\alpha$-halocarboxylic acid on reaction with dil. $NH_3$ gives good yield of $\alpha$-amino carboxylic acid whereas the yield of amines is very low when prepared from alkyl halides.
Reason $(R)$: Amino acids exist in zwitter ion form in aqueous medium.
In the light of the above statements,choose the correct answer from the options given below: