Chemistry - Electrochemistry Question with Solution | TestHub

Consider the following cell reaction

$2\text{F}\text{e}\left(\text{s}\right)+{\text{O}}_2\left(\text{g}\right)+4{\text{H}}^{+}\left(\text{a}\text{q}\right)\to 2\text{F}{\text{e}}^{2+}\left(\text{a}\text{q}\right)+2{\text{H}}_2\text{O}\left(\text{l}\right)$

If${\text{E}}_{\text{c}\text{e}\text{l}\text{l}}={\text{E}}_{\text{c}\text{e}\text{l}\text{l}}^{\text{o}}$at${25}^{\text{o}}\text{C}$and$\left[\text{F}{\text{e}}^{2+}\right]={10}^{-3}\text{M},$${\text{P}}_{{\text{O}}_2}$$=0.01$atm and$\text{p}\text{H}=\text{x}$

Value of$\text{x}$is