Chemistry - Electrochemistry Question with Solution | TestHub

Consider the following recuction processes
$\mathrm{Z}{\mathrm{n}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{Z}\mathrm{n}\left(\mathrm{s}\right);\mathrm{E}°=-0.76\mathrm{V}$
$\mathrm{C}{\mathrm{a}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{C}\mathrm{a}\left(\mathrm{s}\right);\mathrm{E}°=-2.87\mathrm{V}$
$\mathrm{M}{\mathrm{g}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{M}\mathrm{g}\left(\mathrm{s}\right);\mathrm{E}°=-2.36\mathrm{V}$
$\mathrm{N}{\mathrm{i}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{N}\mathrm{i}\left(\mathrm{s}\right);\mathrm{E}°=-0.25\mathrm{V}$
The reduction power of the metals increases in the order