1.

\[{{I}_{2}}(s)|{{I}^{-}}(0.1M)\] half-cell is connected to a \[{{H}^{+}}\left( aq \right)\left| {{H}_{2}}\left( \text{1}bar \right) \right|Pt\] half cell and e.m.f. is found to be\[0.7714V.if\,{{E}^{{}^\circ }}_{{{I}_{2}}|{{I}^{-}}}=0.535\text{ }V\], find the pH of \[{{H}^{+}}|{{H}_{2}}\] half-cell.        

A. 1                     
B. 3     
C. 5                                 
D. 7
Answer» C. 5                                 


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