(a) (i) For a galvanic cell, the following half reactions are given. Decide, which will remain as reduction reaction and which will be reversed to become an oxidation reaction. Give reason for your answer. (I) $\text{Cr}^{3+} + 3\text{e}^- \rightarrow \text{Cr}(\text{s}); \text{E}^\circ = -\,0\cdot74\text{ V}$ (II) $\text{Fe}^{2+} + 2\text{e}^- \rightarrow \text{Fe}(\text{s}); \text{E}^\circ = -\,0\cdot44\text{ V}$