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Why is it not advisable to dissolve KMnO...

Why is it not advisable to dissolve `KMnO_(4)` in conc. `H_(2)SO_(4)` ?

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With conc. `H_(2)SO_(4), KMnO_(4)`reacts to form `Mn_(2)O_(7)` which on warming decomposes to `MnO_(2)` ( see reaction on page ) .
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