When acetamide is treated with $Br_{2}$ and caustic soda,the product formed is

An aromatic compound '$A$' on treatment with aqueous ammonia and heating forms compound '$B$',which on heating with $Br_2$ and $KOH$ forms a compound $C$ of molecular formula $C_6H_7N$. The structures of compound $A, B$ and $C$ are respectively:

$C_2H_5Br$ $\xrightarrow{AgCN} X$ $\xrightarrow{\text{Reduction}} Y$. Here $Y$ is

Explain the method of preparation for amine compounds by the reduction of nitro compounds.

Identify product $B$ obtained in the following reaction: $CH_{3}CH_{2}NO_{2}$ $\xrightarrow[\Delta]{HNO_{2}} A$ $\xrightarrow{LiAlH_{4}} \text{ether} B$

An organic compound $A$ on treatment with $NH_3$ gives $B$,which on heating gives $C$. $C$ when treated with $Br_2$ in the presence of $KOH$ produces ethyl amine. Compound $A$ is: