1.

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

Answer»

chlorine is passed into aqueous `KMnO_(4)`solution
manganesedioxide isfused with potassium hydroxide in air
formaldehyde reacts with potassium permanganate in PRESENCE of a STRONG alkali
potassium permanganate reacts with concentrated sulphuric acid.

Solution :`2MnO_(2)+4KOH+O_(2)RARR underset("Pot. MANGANATE")(2K_(2)MnO_(4))+2H_(2)O`


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