Question

Potassium manganate `(K_2MnO_4)` is formed when
A. `Cl_(2)` is passed into an aqueous solution of `KMnO_(4)`
B. `MnO_(2)` is fuesed with `KOH`
C. Formaldehyde reacts with `KMnO_(4)` in the presence of strong alkali
D. `KMnO_(4)` reacts with conc. `H_(2)SO_(4)`

Answer 1

Correct Answer - 3
`MnO_(4)^(-)` is reduced to `MnO_(4)^(2-)` by `HCHO` in the presence of strong alkali