Predict the major product $(A)$ for the following reaction:

What is the product formed when an aliphatic primary amine reacts with $HNO_2$?

Considering the above reaction,$X$ and $Y$ respectively are

$A$ nauseating smell in the carbylamine test for primary amines is due to the formation of

Boiling ethylamine on reaction with acidified $KMnO_4$ gives:

Identify products $I$ and $II$ in the following reactions: $Aniline \xrightarrow{COCl_2} I$ and $Aniline \xrightarrow{C_2H_5MgI} II$.