The photoelectric current from \(\mathrm{Na}\) (work function, \(\mathrm{w}_{\mathrm{o}}=2.3 \mathrm{~eV}\) ) is stopped…

The photoelectric current from \(\mathrm{Na}\) (work function, \(\mathrm{w}_{\mathrm{o}}=2.3 \mathrm{~eV}\) ) is stopped by the output voltage of the cell
\(\mathrm{Pt}(\mathrm{s}) / \mathrm{H}_{2}\) (g, 1 bar) \(\mid \mathrm{HCl}\) (aq., \(\mathrm{pH}=1\) ) \(|\mathrm{AgCl}(\mathrm{s})| \mathrm{Ag}\) (s)

The \(\mathrm{pH}\) of aq. \(\mathrm{HCl}\) required to stop the photoelectric current from \(\mathrm{K}\left(\mathrm{w}_{o}=2.25 \mathrm{~eV}\right)\), all other conditions remaining the same, is________ \(\times 10^{-2}\) (to the nearest integer).

Given:

\(2.303 \frac{\mathrm{RT}}{\mathrm{F}}=0.06 \mathrm{~V} ; \mathrm{E}_{\mathrm{AgCl}|\mathrm{Ag}| \mathrm{Cl^-}}^{\circ}=0.22 \mathrm{~V}\)

[JEE Main 2020, 3 Sep (Shift 1)]