Question

Sol. Disproportionation is a specific type of redox reaction in which a species is simultaneously reduced and oxidised to form two different products. In Cl₂​, oxidation state of Cl is 0 so it can give disproportionation reaction because Cl shows oxidation state from −1 to +7. In MnO₄^​2−, oxidation state of Mn is +6 so it can give disproportionation reaction because Mn shows oxidation state of +2,+3,+4,+6,+7. In ClO₄^​−, oxidation state of Cl is +7 which is its highest oxidation state. It can be reduced so it cannot give disproportionation reaction.