A reagent is added to a solution of manganous salt in cold dil. `HNO_(3)`. A purple colour appeared due to the formation of permanganic acid. The reagent is:

Options

A. `NaBiO_(2)`
B. `(NH_(4))_(2)C_(2)O_(4)`
C. `H_(2)O_(2)`
D. `KNO_(3)`

Answer

A

Explanation

`2MnSO_(4)+5NaBiO_(3)+16HNO_(3)rarr2HMnO_(4)+5Bi(NO_(3))_(3)+NaNO_(3)+2Na_(2)SO_(4)+7H_(2)O`