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Electrode potential data are given below :
\( \mathrm{Fe}_{(\mathrm{aq})}^{+3}+\mathrm{e}^{-} \longrightarrow \mathrm{Fe}_{(\mathrm{aq})}^{+2} ; \quad \mathrm{E}^{\circ}=+0.77 \mathrm{~V} \)
\( \mathrm{Al}_{(\mathrm{aq})}^{3+}+3 \mathrm{e}^{-} \longrightarrow \mathrm{Al}_{(\mathrm{s})} ; \quad \mathrm{E}^{\circ}=-1.66 \mathrm{~V} \)
\( \mathrm{Br}_{2} \) (aq) \( +2 \mathrm{e}^{-} \longrightarrow 2 \mathrm{Br}_{(\mathrm{aq})}^{-} ; \mathrm{E}^{\circ}=+1.08 \mathrm{~V} \)
Based on the data, the reducing power of \( \mathrm{Fe}^{2+}, \mathrm{Al} \) and \( \mathrm{Br}^{-} \) will increase in the order
(a) \( \mathrm{Br}^{-}\mathrm{Fe}^{2+}\mathrm{Al} \)
(b) \( \mathrm{Fe}^{2+}\mathrm{Al}\mathrm{Br}^{-} \)
(c) \( \mathrm{Al}\mathrm{Br}^{-}\mathrm{Fe}^{2+} \)
(d) \( \mathrm{Al}\mathrm{Fe}^{2+}\mathrm{Br}^{-} \)
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