What is formed when $RCN$ is treated with sodium and alcohol?

Explain the reaction of diazotization with suitable examples.

What is obtained by the reduction of acetaldoxime?

In a set of reactions,propionic acid yielded a compound $D$.
$CH_3CH_2COOH$ $\xrightarrow{SOCl_2} B$ $\xrightarrow{NH_3} C$ $\xrightarrow{KOH, Br_2} D$
The structure of $D$ would be

What are the products $C$ and $D$ in the given reaction?
$Phthalimide$ $\xrightarrow{KOH} A$ $\xrightarrow{C_2H_5Br} I$ $\xrightarrow{HOH/H^+} C + D$

$A$ $\xrightarrow[{CHCl_3}]{{KOH}} B$ $\xrightarrow[{H^\oplus}]{{LiAlH_4}} CH_3CH_2NHCH_3$
Identify compound $A$.