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Potassium manganate (K(2)MnO(4)) is form...

Potassium manganate `(K_(2)MnO_(4))` is formed when:

A

Chloride is passed through aqueous `KMnO_(4)` solution.

B

Manganese dioxide is fused with potassium hydroxide in air.

C

Formaldehyde reacts with potassium permanganatein presence of strong alkali.

D

Potassium permanganate reacts with `H_(2)SO_(4)`.

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