CBSE 2025 · Region 1 · Set 1 · Q2 · 1 mark
Standard electrode potential for $\displaystyle \mathrm{Sn}^{4+} / \mathrm{Sn}^{2+}$ couple is +$\displaystyle 0.15$ V and that for the $\displaystyle \mathrm{Cr}^{3+} / \mathrm{Cr}$ couple is -$\displaystyle 0.74$ V . The two couples in their standard states are connected to make a cell. The cell potential will be
Official answer
From CBSE’s own marking scheme for this paper.
(B)
+$\displaystyle 0.89$ V
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CBSE Class 12 Chemistry past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.