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$\mathrm{E}^0$ value of $\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}$ couple is more than the $\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}$ The correct reason is:
Option: 1
No. of unpaired d-electrons in $\mathrm{Mn}^{2+}$ is 4 and in $\mathrm{Cr}^{2+}$ is 5.

Option: 2
No. of unpaired d-electrons in $\text{Mn}^{2+}$ is 5 and in $\text{Cr}^{3+}$ is 5

Option: 3
No. of unpaired d-electrons in $\text{Mn}^{2+}$ is 4 and in $\text{Cr}^{2+}$ is 5

Option: 4
No. of unpaired d-electrons in $\text{Mn}^{3+}$ is 5 and in $\text{Cr}^{3+}$ is 4.

Answers (1)

best_answer

Half filled orbitals are much more stable than partially filled orbitals.

Posted by

Ritika Jonwal

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