The pressure of \( \mathrm{H}_{2} \) required to make the potential P of \( \mathrm{H}_{2} \)-el...

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The pressure of \( \mathrm{H}_{2} \) required to make the potential
P of \( \mathrm{H}_{2} \)-electrode zero in pure water at \( 298 \mathrm{~K} \) is :-

W)
(1) \( 10^{-14} \mathrm{~atm} \)
(2) \( 10^{-12} \mathrm{~atm} \)
(3) \( 10^{-10} \) atm
(4) \( 10^{-4} \mathrm{~atm} \)
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