Q18Short answer
MnO 24 – undergoes disproportionation reaction in acidic medium but MnO4 does not. Give reason.
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In MnO 4– , Mn is in the highest oxidation state i.e. +7. Therefore, it does 2– not undergo disproportionation. MnO4 undergoes disproportionation as follows : 3MnO4 + 4H 2MnO4 + MnO2 + 2H2O 2– + –