Identify product $B$ in the following reaction: $CH_3Br + AgNO_2$ $\longrightarrow A$ $\xrightarrow{Sn / HCl} B$

Which of the following reaction/s does not yield an amine?
$I. R-X + NH_3 \xrightarrow{\Delta} \text{(alc)}$
$II. R-C \equiv N \xrightarrow{H_2/Ni \text{ or } Na(Hg)/C_2H_5OH}$
$III. R-C \equiv N + H_2O \xrightarrow{H^+}$
$IV. R-CONH_2 + 4[H] \xrightarrow{i) LiAlH_4, ii) H_3O^+}$

An organic compound $A$ upon reacting with $NH_3$ gives $B$. On heating $B$ gives $C$. $C$ in presence of $KOH$ reacts with $Br_2$ to give $CH_3CH_2NH_2$. $A$ is:

Number of isomeric aromatic amines with molecular formula $C_8H_{11}N$,which can be synthesized by Gabriel Phthalimide synthesis is $.........$.

Which of the following compounds reacts with $KOH$ and $Br_2$ to form ethylamine?

What is the number of moles of $H$ atoms required to prepare one mole of ethylamine from one mole of acetamide?