CBSE 2023 · Region 5 · Set 2 · Q3 · 1 mark
Consider the following standard electrode potential values : $\displaystyle \mathrm{Fe}^{3+}{ }_{(\mathrm{aq})}+\mathrm{e}^{-} \rightarrow \mathrm{Fe}^{2+}{ }_{(\mathrm{aq})} \mathrm{E}^{\circ}=+0.77 \mathrm{~V}$ $\displaystyle \mathrm{MnO}_{4}{ }^{-}{ }_{(\mathrm{aq})}+8 \mathrm{H}^{+}+5 \mathrm{e}^{-} \rightarrow \mathrm{Mn}^{2+}{ }_{(\mathrm{aq})}+4 \mathrm{H}_{2} \mathrm{O}_{(l)} \mathrm{E}^{\circ}=+1.51 \mathrm{~V}$ What is the cell potential for the redox reaction ?
Official answer
From CBSE’s own marking scheme for this paper.
(C)
+$\displaystyle 0.74$ V
ElectrochemistryNernst EquationApplymcqmedium
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CBSE Class 12 Chemistry past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.