The correct order of increasing basic nature for the bases $NH_{3}$,$CH_{3}NH_{2}$ and $(CH_{3})_{2}NH$ in aqueous solutions is:

$CH_3CH_2I$ $\xrightarrow{NaCN} A$ $\xrightarrow{OH^- \text{ (partial hydrolysis)}} B$ $\xrightarrow{Br_2/NaOH} C$. Identify the final product $C$.

$A$ hydrocarbon $A$ $(C_{4}H_{8})$ on reaction with $HCl$ gives a compound $B$ $(C_{4}H_{9}Cl)$ which on reaction with $1 \ mol$ of $NH_{3}$ gives compound $C$ $(C_{4}H_{11}N)$. On reacting with $NaNO_{2}$ and $HCl$ followed by treatment with water,compound $C$ yields an optically active compound $D$. The compound $D$ is

Which of the following amines would undergo diazotisation?

Give uses of amine compounds as medicines.

The reaction of aniline with chloroform and alcoholic $KOH$ yields .....