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MnO(2) when fused with KOH and oxidized ...

`MnO_(2)` when fused with KOH and oxidized in air gives a dark green compound X. In acidic solution, X undergoes disproportionation to give an intense purple compound Y and `MnO_(2)`. compounds X and Y, respectively, are

A

`K_(2)MnO_(4) and KMnO_(4)`

B

`Mn_(2)O_(7) and KMnO_(4)`

C

`K_(2)MnO_(4) and Mn_(2)O_(7)`

D

`KMnO_(4) and K_(2)MnO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
A
`{:(MnO_(2)+KO_(2)overset("Oxidized")underset("In Air")(to)dark green compound (X)+MnO_(4)^(-2) & K_(2)MnO+_(4)),(" ""Disproportionation"darr),(" ""Purple colour"(Y)+Mnoverset(+4)(O_(2))),(" "overset(" "+7)(KMn)O_(4)):}`
`" "(X)toK_(2)MnO_(4)`
`" "(Y)toKMnO_(4)`
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