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Q.

MnO42−  is quite strongly oxidizing and is stable only in very strong alkali. In acidic solution it disproportionate as
a MnO42−+H+→______+MnO2+H2O
Find the value of ‘a’ in the above balanced reaction:
 

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answer is 3.

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Detailed Solution

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3 MnO42−+4H+→2MnO4−+MnO2+2H2O

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