When acidified solution of `K_(2)Cr_(2)O_(7)` is shaken with aqeous solution of `FeSO_(4)`, Then:

Options

A. `Cr_2O_7^(2-)` ion is reduced to `Cr^(3+)` ion
B. `Cr_2O_7^(2-)` ion is converted by `Cr_2O_4^(2-)` ions
C. `Cr_2O_7^(2-)` ion is oxidised to Cr
D. `Cr_2O_7^(2-)` ion is oxidised to `CrO_3`

Answer

A

Explanation

`K_2Cr_2 O_7 + 4H_2SO_4 to K_2SO_4 + Cr_2(SO_4)_3 + 4H_2O + 3[O]`
`Cr_2O_7^(2-) + 14H^(+) + 6e^(-) to 2Cr^(3+) + 7H_2O`
`6Fe^(2+) to 6Fe^(3+) + 6e^(-)`