In the following redox reactionn, `Cr_(2)O_(7)^(2-) + Fe^(2+) to Fe^(3+) + Cr^(3+)` 1 mole of `Cr_(2)O_(7)^(2-)` oxidises.

Options

A. 1 mole of `Fe^(2+)`
B. 3 mole of `Fe^(2+)`
C. 4 moles `Fe^(2+)`
D. 6 moles of `Fe^(2+)`

Answer

D

Explanation

`underset("1 mole")(Cr_(2)O_(7)^(2-)) + underset("6 mole")(6Fe^(2+)) + 14H^(+) to 2Cr^(3+) + 7H_(2)O + 6Fe^(3+)`