When the ion `Cr_2O_7^(2-)` acts as an oxidant in acidic aqueous solution the ion `Cr^(3+)` is formed. How many mole of `Sn^(2+)` would be oxidised to `Sn^(4+)` by one mole of `Cr_2O_7^(2-)`ions?

Options

A. `2//3`
B. `3//2`
C. `2`
D. `3`

Answer

D

Explanation

`[Cr_(2)^(6+) + 6e to 2 Cr^(3+)] xx 1 , [ sn^(2+) to Sn^(4+) + 2e^(-) ] xx 3`