Standard electrode potentials are:

\(F e^{+ 2} / F e\) , \(E^\circ\) \(=\) \(- 0 .44\)

\(F e^{+ 3} / F e^{+ 2}\), \(E ^\circ\) \(= 0 . 77\)

Choose the correct observation when \(𝐹𝑒^{+2}\) ${\mathrm{}}^{}$, \(𝐹𝑒^{+3}\) and \(Fe_{(solid)}\) are kept together:

1. $F{e}^{+3}$ increases

2. $F{e}^{+3}$ decreases

3. $\frac{F{e}^{+2}}{F{e}^{+3}}$ remains unchanged

4. $F{e}^{+2}$ decreases