What happen when a solution of potassium chromate is treated with an excess of dil. Nitic acid?
A. Cr reduces in the oxidation state +3 from `CrO_(4)^(2-)`.
B. Cr oxidises in the oxidation state +7 from `CrO_(4)^(2-)`.
C. `Cr^(+3)` and `Cr_(2)O_(7)^(2-)` will be formed.
D. `Cr_(2)O_(7)^(2-)` and `H_(2)O` will be formed.
