Find $A$ in the reaction $R-NH_2 + A \longrightarrow$ Schiff base.

Why is aniline soluble in aqueous $HCl$?

Write the importance of diazonium salts in the synthesis of aromatic compounds.

Primary nitro alkanes are obtained in good yield by oxidising aldoximes with the help of $-$

$A$ primary aliphatic amine on reaction with nitrous acid in cold $(273 \, K)$ and thereafter raising the temperature of the reaction mixture to room temperature $(298 \, K)$ gives a/an .....

$C_6H_5CONHCH_3$ can be converted into $C_6H_5CH_2NHCH_3$ by