The main product obtained in the reaction of acetamide and $\mathrm{H}\mathrm{N}{\mathrm{O}}_2$ is

The increasing order of the reactivity of the following with $\text{L}\text{i}\text{A}\text{l}{\text{H}}_4$ is:

$\left(A\right)$

$\left(B\right)$

$\left(C\right)$

$\left(D\right)$

Compound $\mathrm{P}$ is neutral, $\mathrm{Q}$ gives effervescence with ${\mathrm{NaHCO}}_3$ while $\mathrm{R}$ reacts with Hinsberg’s reagent to give solid soluble in $\mathrm{NaOH}.$ Compound $\mathrm{P}$ is

The decreasing order of ease of alkaline hydrolysis for the following esters is

How will you bring about the following conversion in not more than two steps? 

Benzoic acid to m-Nitrobenzyl alcohol