Q. A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be
A) 0.059 V
B) 0.59 V
C) 0.118 V
D) 1.18 V
Explanation
[Solution from source] For H₂ → 2H⁺ + 2e⁻ at 1 atm, E(oxidation) = 0 − (0.059/2) log[H⁺]² = −0.059 log[H⁺] = 0.059 × pH. With pH 10: 0.059 × 10 = 0.59 V. 0.059 V would correspond to pH 1. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.