Pick out the incorrect statement.A. `MnO_(4)^(2-)` is quite strongly oxidizing and stable only in very strong alkalies. In dilute alkali, water or acidic solutions , it disproportionates.B. In acidic solutions, `MnO_(4)^(-)` is reduced to `Mn ^(2+)` and thus, `KMnO_(4)` is widely used as oxidizing agentC. `KMnO_(4)` does not act as oxidizing agent in alkaline mediumD. `KMnO_(4)` is manufactured by the fusion of pyrolusite ore with KOH in presence of air or `KNO_(3).` followed by electrolytic oxidation in alkaline solution.

Pick out the incorrect statement.A. `MnO_(4)^(2-)` is quite strongly o

1.	Pick out the incorrect statement.A. `MnO_(4)^(2-)` is quite strongly oxidizing and stable only in very strong alkalies. In dilute alkali, water or acidic solutions , it disproportionates.B. In acidic solutions, `MnO_(4)^(-)` is reduced to `Mn ^(2+)` and thus, `KMnO_(4)` is widely used as oxidizing agentC. `KMnO_(4)` does not act as oxidizing agent in alkaline mediumD. `KMnO_(4)` is manufactured by the fusion of pyrolusite ore with KOH in presence of air or `KNO_(3).` followed by electrolytic oxidation in alkaline solution.
Answer» Correct Answer - C Alkaline `KMnO_(4)` also acts as oxidizing agent. `MnO_(4)^(-) +2H_(2) O+3e^(-)to MnO_(2)+ 4OH^(-)` a) `MnO_(4)^(2-)` disproportionate in water, dilute alkali or acidic solution. `overset((+6))(MnO_(4)^(2-))+4H^(+)to overset((+7))(2MnO_(4)^(-))+overset((+4))(+MnO_(2))+2H_(2)O` b) `MnO_(4)^(-)` is reduced to `Mn^(2+)` involbing a change of five electrons. `MnO_(4)^(-)+8H^(+)+5e^(-)to Mn ^(2+) +4H_(2)O` d) `MnO_(2) +2KOH +1/2O_(2) to K_(2)MnO_(4) +H_(2) O` Anode : `MnO_(4)^(2-)overset("Alkaline")underset("Solution")toMnO_(4)^(-)+e^(-)` Cathode : `2H^(+)+2e^(-) to H_(2)`