Given
$\begin{array}{l}{\mathrm{E}}_{{\mathrm{Ag}}^{+}/\mathrm{Ag}}^{\circ }=0.80\mathrm{V},{\mathrm{E}}_{{\mathrm{Mg}}^{2+}/\mathrm{Mg}}^{\circ }=-2.37\mathrm{V},\\ {\mathrm{E}}_{{\mathrm{Cu}}^{2+}/\mathrm{Cu}}^{\circ }=0.34\mathrm{V},{\mathrm{E}}_{{\mathrm{Hg}}^{2+}/\mathrm{Hg}}^{\circ }=0.79\mathrm{V}\end{array}$

AgNO₃ can be stored in copper vessel

Mg(NO₃)₂ cannot be stored in copper vessel

CuCl₂ can be stored in silver vessel

HgCl₂ can be stored in copper vessel