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For the cell \( \mathrm{Zn}(\mathrm{s})\left|\mathrm{Zn}^{2+}(\mathrm{aq})\right|\left|\mathrm{M}^{\mathrm{x}+}(\mathrm{aq})\right| \mathrm{M}(\mathrm{s}) \), different half cells and standard electrode potentials are given below
\[
\begin{array}{lllll}
\mathrm{M}^{\mathrm{x}+}(\mathrm{aq}) & \mathrm{Au}^{3+}(\mathrm{aq}) & \mathrm{Ag}^{+}(\mathrm{aq}) & \mathrm{Fe}^{3+}(\mathrm{aq}) & \mathrm{Fe}^{2+}(\mathrm{aq}) \\
\mathrm{M}(\mathrm{s}) & \mathrm{Au}(\mathrm{s}) & \mathrm{Ag}(\mathrm{s}) & \mathrm{Fe}^{2+}(\mathrm{aq}) & \mathrm{Fe}(\mathrm{s}) \\
\mathrm{E}_{\mathrm{N}^{x+} / \mathrm{N}}^{0} /(\mathrm{V}) & 1.40 & 0.80 & 0.77 & -0.44 \\
\mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{0}=-0.76 \mathrm{~V}, \text { Which cathode will give a maximum }
\end{array}
\]
value of \( \mathrm{E}^{\mathrm{o}} \) cell per electron transferred?
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