Question
Compound $\mathrm{P}$ is neutral, $\mathrm{Q}$ gives effervescence with $\mathrm{NaHCO}_{3}$ while $\mathrm{R}$ reacts with Hinsbergs reagent to give solid soluble in $\mathrm{NaOH}$. Compound $\mathrm{P}$ is
Compound $\mathrm{P}$ is neutral, $\mathrm{Q}$ gives effervescence with $\mathrm{NaHCO}_{3}$ while $\mathrm{R}$ reacts with Hinsbergs reagent to give solid soluble in $\mathrm{NaOH}$. Compound $\mathrm{P}$ is