Chemistry · 2023
JEE Main · 29 January 2023, Shift 1 · Q40
The standard electrode potential ( M^3+ / M^2+) for V, Cr, Mn & Co are -0.26 V, -0.41 V,+1.57 V and +1.97 V, respectively. The metal ions which can…
The standard electrode potential $\displaystyle \left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)$ for V, Cr, Mn & Co are -$\displaystyle 0.26$ V, $\displaystyle -0.41 \mathrm{~V},+1.57 \mathrm{~V}$ and +$\displaystyle 1.97$ V , respectively. The metal ions which can liberate $\displaystyle \mathrm{H}_2$ from a dilute acid are
Official answer
From NTA’s final answer key for this paper.
(3)
$\displaystyle \mathrm{V}^{2+}$ and $\displaystyle \mathrm{Cr}^{2+}$
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JEE Main 2023 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.