CUET · CHEMISTRY · PYQ PAPER 2023
How many C \(\text{mol}^{-1}\) are required to convert 1 mol of \(\text{MnO}_4^-\) to \(\text{Mn}^{2+}\)?
[1F = 96500 C]
- A 96500 C \(\text{mol}^{-1}\)
- B 193000 C \(\text{mol}^{-1}\)
- C 386000 C \(\text{mol}^{-1}\)
- D 482500 C \(\text{mol}^{-1}\)
Answer & Solution
Correct Answer
(D) 482500 C \(\text{mol}^{-1}\)
Step-by-step Solution
Detailed explanation
Oxidation state of Mn in \( \text{MnO}_4^- \) is \( +7 \). Oxidation state of Mn in \( \text{Mn}^{2+} \) is \( +2 \). Number of electrons transferred \( = +7 - (+2) = 5 \). Charge required \( = 5 \times 1 \text{ F} \). Charge required…
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