Standard electrode potential are `E_(Fe^(2+)|Fe)^(@)=-0.44V,E_(Fe^(3+)|Fe^(2+))^(@)=0.77V`. If `Fe,Fe^(2+)` and `Fe^(3+)` are kept together, then

Options

A. `Fe^(3+)` increases
B. `Fe^(3+)` decreases
C. `Fe^(2+)` increases
D. `Fe^(2+)` decreases

Answer

B, C

Explanation

`Fe^(2+)+Fe^(2+)toFe^(3+)+Fe` (non spontaneous)