$$\begin{gathered} \mathrm{Aqueous} \mathrm{solution} \mathrm{of} {\mathrm{AgNO}}_3 \mathrm{is} \mathrm{electrolysed} \mathrm{using} \mathrm{Pt} \mathrm{electrodes}. \\ \mathrm{Products} \mathrm{obtained} \mathrm{at} \mathrm{anode} \mathrm{and} \mathrm{cathode} \mathrm{respectively} \end{gathered}$$

 At cathode

${\mathrm{E}}_{{\mathrm{Ag}}^{+}/\mathrm{Ag}}^{\mathrm{o}}>{\mathrm{E}}_{{\mathrm{H}}^{+}/\frac{1}{2}{\mathrm{H}}_2,\mathrm{Pt}}^{\mathrm{o}}$

$\therefore \left[{\mathrm{Ag}}^{+}+{\mathrm{e}}^{-}\to \mathrm{Ag}\downarrow \right]\times 4$

At anode

$\mathrm{SRP}\mathrm{of}{\mathrm{NO}}_3^{-}/{\mathrm{NO}}_2,{\mathrm{NO}}_3^{-}/\mathrm{NO}\mathrm{are} \mathrm{high}$

${\mathrm{E}}_{{\mathrm{O}}_2/{\mathrm{H}}_2\mathrm{O}}^{\mathrm{o}}<{\mathrm{E}}_{{\mathrm{NO}}_3^{-}/{\mathrm{NO}}_{\mathrm{x}}}^{\mathrm{o}}$

$\left(\mathrm{or}\right) \mathrm{SOP}\mathrm{of}{\mathrm{E}}_{{\mathrm{H}}_2\mathrm{O}/{\mathrm{O}}_2}^{\mathrm{o}}>{\mathrm{E}}_{{\mathrm{NO}}_{\mathrm{x}}/{\mathrm{NO}}_3^{-}}^{\mathrm{o}}$

$2{\mathrm{H}}_2\mathrm{O}\to 4{\mathrm{H}}^{+}+4{\mathrm{e}}^{-}+{\mathrm{O}}_2$