question_answer

Potassium manganate \[\left( {{K}_{2}}Mn{{O}_{4}} \right)\] is formed when

A)  Chlorine is passed into aqueous \[KMn{{O}_{4}}\] 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 co n ce n trated sulphuric acid.