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Question

Chemistry Question on d -and f -Block Elements

KMnO4KMnO_4 in alkaline medium changes to

A

Mn3+Mn^{3+}

B

MnO2MnO_2

C

MnO42MnO_4^{2-}

D

Mn(OH)4Mn(OH)_4^-

Answer

MnO2MnO_2

Explanation

Solution

In alkaline solution, KMnO is first reduced to manganate and then to insoluble manganese dioxide. 2KMnO4+H2O>[alkaline]2MnO2+2KOH+3[O] {2KMnO4 + H2O ->[alkaline] 2MnO2 + 2KOH + 3[O]}