$\mathrm{X}$ is $\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{N}$ (Cyanomethane)
$\mathrm{X} \stackrel{\mathrm{H}}{\longrightarrow} \mathrm{Z}$
$\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{N} \stackrel{\mathrm{H}}{\longrightarrow} \mathrm{CH}_{3} \mathrm{COOH}$
$\mathrm{Z}=\mathrm{CH}_{3} \mathrm{COOH}$
Product after mixing $\mathrm{Y}$ and $\mathrm{Z}$ is $\left(\mathrm{CH}_{3} \mathrm{COO}^{-}\right)+\left(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{3}^{+}\right)$ (Substituted Ammonium Carboxylate Salt)
$I.$ ${Sn}-{HCl}$ $II.$ ${Sn}-{NH}_{4} {OH}$ $III.$ ${Fe}-{HCl}$ ${IV} . {Zn}-{HCl}$ $V.$ ${H}_{2}-{Pd}$ $VI.$ ${H}_{2}-$ રેની નિકલ
(આપેલ : આણ્વિય દળ : $C : 12.0\, u , H : 1.0 \,u,N : 14.0\, u , O : 16.0\, u , Cl : 35.5\, u )$