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

Aniline is treated with $NaNO_2 + HCl$ at low temperature to form:

Select the reagents that reduce nitriles to primary amines:
$A$. $(i) \text{LiAlH}_4$; $(ii) \text{H}_2\text{O}$
$B$. $\text{Sn} + \text{HCl}$
$C$. $\text{H}_2/\text{Ni}$
$D$. $\text{Na(Hg)}/\text{C}_2\text{H}_5\text{OH}$
$E$. $\text{Br}_2/\text{aq. NaOH}$
Choose the correct answer from the options given below:

The diazonium salts are the reaction products in the presence of excess of mineral acid with nitrous acid and:

Which one of the following compounds undergoes Hoffmann degradation reaction?

What is obtained by the reaction of acetamide with bromine and caustic soda?