\( E_{\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}}^{\circ}E_{\mathrm{Cr}^{3...

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\( E_{\mathrm{Mn}^{3+} / \mathrm{Mn}^{2+}}^{\circ}E_{\mathrm{Cr}^{3+} / \mathrm{Cr}^{2+}}^{\circ} \) This trend is found because
- (a) \( \mathrm{Mn}^{2+} \) can be easily oxidised to \( \mathrm{Mn}^{3+} \) due to low ionisation enthalpy
- (b) third IE of Mn is much larger due to its stable configuration
- (c) \( \mathrm{Mn}^{3+} \) is more stable than \( \mathrm{Mn}^{2+} \) due to its higher oxidation state
- (d) second IE of Mn is higher than its third IE
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