Explanation:
(d)Acetamide can behave as weak acid as well as base.
$C{{H}_{3}}-CO-N{{H}_{2}}+HCl\to \underset{\begin{smallmatrix}
\text{Acetamide}\,\text{hydrogen}\, \\
\,\,\,\,\,\,\,\,\,\,\,\,\text{chloride}
\end{smallmatrix}}{\mathop{C{{H}_{3}}CONH_{3}^{+}C{{l}^{-}}}}\,$
\(2C{H_3}CON{H_2} + HgO \to \mathop {{{(C{H_3}CONH)}_2}Hg + {H_2}O}\limits_{{\rm{Mercuric}}\,{\rm{acetamide}}} \)