Question

Electrode potential data of few cells is given below. Based on the data, arrange the ions in increasing order of their reducing power :-
$F{e}_{(aq)}^{3+}+e^{-}\to {\left(Fe\right)}^{2+}\_{(aq)}^{};E^{\circ }=+0.77V$
${\left(Al\right)}^{3+}\_{(aq)}^{}+3e^{-}\to {\left(Al\right)}_{(s)};E^{\circ }=-1.66V$
${\left(Br\right)}_{2(aq)}+2e^{-}\to 2B{r}_{(aq)}^{-};E^{\circ }=+1.09V$

• A. $B{r}^{-}<F{e}^{2+}<Al$
• B. $F{e}^{2+}<Al<B{r}^{-}$
• C. $Al<B{r}^{-}<F{e}^{2+}$
• D. $Al<F{e}^{2+}<B{r}^{-}$

Answer 1

Answer: (A)

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