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Potassium manganate (K2MnO4) is formed w...

Potassium manganate `(K_2MnO_4)` is formed when

A

chlorine is passed into aqueous `KMnO_(4)` solution

B

manganese dioxide is fused with potassium hydroxide in air

C

formaldehyde reacts with potassium permanganate in presence of a strong alkali

D

potassium permanganate reacts with conc. Sulphuric acid

Text Solution

Verified by Experts

The correct Answer is:
B, C
`2MnO_(2)+4KOH+O_(2)overset("heat")(rarr)2K_(2)MnO_(4)+2H_(2)O,`
`2KOH+HCHO+2KMnO_(4)rarrK_(2)MnO_(4)+H_(2)O+HCOOH`
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