Pyrolusite is `MnO_(2)` used to prepare `KMnO_(4)`. Steps are, `MnO_(2)overset(I)(rarr)MnO_(4)^(2-)overset(II)(rarr)MnO_(4)^(-)`

Pyrolusite is `MnO_(2)` used to prepare `KMnO_(4)`. Steps are, `MnO_(2)overset(I)(rarr)MnO_(4)^(2-)overset(II)(rarr)MnO_(4)^(-)` Steps I and II are respectively`:`
A. fuse with KOH/air, electrolytic oxidation
B. fuse with KOH/`KNO_(3)`, electrolytic oxidation
C. fise with concentrated `HNO_(2)`air, electrolytic reduction
D. dissolve in `H_(2)O` oxidation.

Pyrolusite is `MnO_(2)` used to prepare `KMnO_(4)`. Steps are, `MnO_(2)overset(I)(rarr)MnO_(4)^(2-)overset(II)(rarr)MnO_(4)^(-)` Steps I and II are re

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