Identify the major product formed in the following reaction: $C_6H_5NH_2 + CHCl_3 + 3KOH \to ?$

$Benzamide$ $\xrightarrow{Br_2 / NaOH} X$ $\xrightarrow[\text{alc. } KOH]{CHCl_3} Y$
The conversion of $X$ to $Y$ is

Consider the three aromatic molecules ($P$, $Q$ and $R$) whose structures are given below. The correct order regarding the reactivity of these compounds with $Ph-N\equiv N^{(+)}Cl^{(-)}$ under optimum but slightly acidic medium is:

Primary nitroalkanes on boiling with hydrochloric acid undergo hydrolysis to form

Which one of the following gives a foul-smelling substance when treated with chloroform and alcoholic $KOH$?

$A$ compound with molecular mass $180$ is acylated with $CH_3COCl$ to get a compound with molecular mass $390$. The number of amino groups present per molecule of the former compound is: