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| 1. |
Why are Mn^(2+) compounds more stable than Fe^(2+) towards oxidation to their +3 state ? |
| Answer» SOLUTION :Electronic configuration of `Mn^(2+)` is `3d^(5)` which is half-filled and hence stable. THEREFORE, third ionisation enthalpy is very high, i.e., third ELECTRON cannot be lost EASILY as it WOULD affect the stability of `3d^(5)` configuration. In case of `Fe^(2+)`, electronic configuration is `3d^(6)`. Hence, it can lose one electron easily to give the stable configuration `3d^(5)`. | |