Given `E^(c-)._(Fe^(2+)|Fe)` and `E^(c-)._(Fe^(3+)|Fe^(2+))` are `-0.44` and `0.77V` respectively.
If `Fe^(2+),Fe^(3+)` and `Fe` blocks are kept together, then `[Fe^(3+)]` `……………………` and `[Fe^(2+)]…………………….` .

Options

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

Answer

b

Explanation

Cell reaction `: 2Fe^(3+)+Fe rarr 3Fe^(2+)`
`E^(c-)._(cell)=0.77-(-0.44)=1.21V`
`implies Fe^(3+)` and `Fe` will reduce.