1.
Correct cell reaction for the cell representation Pt ∣ Fe2+, Fe3+ ∥ MnO2, Mn2+, H+ ∣ Pt\text{Pt}\,|\,\text{Fe}^{2+},\,\text{Fe}^{3+}\,\|\,\text{MnO}_2,\,\text{Mn}^{2+},\,\text{H}^+\,|\,\text{Pt} is: