Chemistry - Electrochemistry Question with Solution | TestHub

(i)$\underset{\underset{3\mathrm{ }\mathrm{F}}{1\text{ mol = 1F}}}{\mathrm{A}{\mathrm{g}}^{+}\left(\mathrm{a}\mathrm{q}\right)}+{\mathrm{e}}^{-}\to \underset{\underset{3\text{ mol}}{1\text{ mol}}}{\mathrm{A}\mathrm{g}\left(\mathrm{s}\right)}$

(ii)$\underset{\underset{3\mathrm{ }\mathrm{F}}{1\text{ mol = 2F}}}{{\mathrm{Ni}}^{2+}\left(\mathrm{a}\mathrm{q}\right)}+2{\mathrm{e}}^{-}\to \underset{\underset{\frac{3}{2}\text{ mol}}{1\text{ mol}}}{\mathrm{N}\mathrm{i}\left(\mathrm{s}\right)}$

(iii)$\underset{1\text{ mol = 3F}}{{\text{Cr}}^{3+}\left(\text{aq}\right)}+3{\text{e}}^{-}\to \underset{1\text{ mol}}{\text{Cr}\left(\text{s}\right)}$

The required ratio of moles of Ag, Ni and Cr is

3 mol Ag: 3/2 mol Ni : 1 mol Cr or 6 mol Ag : 3 mol Ni : 2 mol Cr.