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Question

A green solution of potassium manganate (VI) turns purple and a brown solid is precipitated, when CO2 gas is bubbled through the solution.

The purple colour is due to the formation of X, and the brown solid that is precipitated is Y. X and Y respectively are:

A
Manganese dioxide (IV), Potassium permanganate (VIII)
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B
Potassium permanganate (VII), Manganese dioxide (IV)
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C
Potassium permanganate (VIII), Manganese oxide (II)
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D
Manganese oxide (II), Manganese trioxide (III)
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Solution

The correct option is B Potassium permanganate (VII), Manganese dioxide (IV)
3K2MnO4+2CO22KMnO4purple+MnO2(brown solid)+2K2CO3

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