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  4. H 2 O 2 oxidizes MnO 2 to MnO 4-in basic medium. H 2 O 2 and MnO 2 react in the molar ratio of

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Q. $H _2 O _2$ oxidizes $MnO _2$ to $MnO _4^{-}$in basic medium. $H _2 O _2$ and $MnO _2$ react in the molar ratio of

General Principles and Processes of Isolation of Elements

Solution:

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Balancing of O.N.
$3 H _2 O _2+2 MnO _2 \rightarrow MnO _4^{-}+6 H _2 O$
Thus, $H _2 O _2: MnO _2=3: 2$