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In the preparation of KMnO4 , pyrolusite (MnO2) is first converted to potassium manganate

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In the preparation of KMnO4 , pyrolusite (MnO2) is first converted to potassium manganate (K2MnO4). In this conversion, the oxidation state of manganese changes from 

a) + 1 to + 3 

b) + 2 to + 4 

c) + 3 to + 5 

d) + 4 to + 6

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1 Answer

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by (56.9k points)

Correct option is d) + 4 to + 6

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