Question

What happen when a solution of potassium chromate is treated with an excess of dil. Nitic acid?
A. `Cr^(3+)`and `Cr_(2)O_(7)^(2-)` are formed
B. `Cr_(2)O_(7)^(2-)` and `H_(2)O` are formed
C. `CrO_(4)^(2-)` is reduced to `Cr^(3+)`
D. `CrO_(4)^(2-)` is oxidised to `Cr_(2)O_(7)^(2-)`

Answer 1

Correct Answer - B
The reaction of `K_(2)CrO_(4)` with dilute nitric acid is represented as
`2CrO_(4)^(2-)+2H^(+)rarrCr_(2)O_(7)^(2-)+H_(2)O`