Most acidic hydrogen is present in

The $\mathrm{IUPAC}$ name of the given acid is

${\mathrm{CH}}_3{\mathrm{COC}}_2{\mathrm{H}}_5\stackrel{\mathrm{NaOH}/{\mathrm{I}}_2}{⟶} \underset{\mathrm{yellow} \mathrm{ppt}.}{\mathrm{X}} \stackrel{\mathrm{Ag}}{⟶}\mathrm{Y}\left(\mathrm{g}\right)$.

In this sequence, the gaseous product $\mathrm{Y}$ is

$\mathrm{x}$ may be

In the above reaction, product $\mathrm{P}$ is