Chemistry - Electrochemistry Question with Solution | TestHub

The standard reduction potentials at $298\mathrm{K}$ for the following half reactions are given against each $\begin{array}{ll}{\mathrm{Zn}}^{2+}(\mathrm{aq})+2{\mathrm{e}}^{-}\to \mathrm{Zn}(\mathrm{s})& {\mathrm{E}}_0=-0.762\mathrm{V}\\ {\mathrm{Cr}}^{3+}(\mathrm{aq})+3{\mathrm{e}}^{-}\to \mathrm{Cr}(\mathrm{s})& {\mathrm{E}}_0=-0.740\mathrm{V}\\ 2{\mathrm{H}}^{+}(\mathrm{aq})+2{\mathrm{e}}^{-}\to {\mathrm{H}}_2(\mathrm{g})& {\mathrm{E}}_0=0.00\mathrm{V}\\ {\mathrm{Fe}}^{3+}(\mathrm{aq})+3{\mathrm{e}}^{-}\to {\mathrm{Fe}}^{2+}(\mathrm{aq})& {\mathrm{E}}_0=+0.762\mathrm{V}\end{array}$