s-Block ElementsHard

Question

White Mn(OH)2 becomes green coloured compound on reaction with sodium peroxide. It is :

Options

A.because of the formation of manganate ions.
B.because of the formation of MnO(OH)2.
C.because of the formation of Mn2+ ions.
D.because of the formation of  permanganate ions.

Solution

Mn(OH)2 + 2O22- → MnO42- (green) + 2OH-.

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