Which is not true about SHE?
Correct answer: C. One molar solution of H2SO4 is used as electrolyte
- A. Finely divided platinum black is used as electrode
- B. Temperature is kept 25°C
- C. One molar solution of H2SO4 is used as electrolyte
- D. Electrode potential of any element can be calculated by comparison method
Explanation
The Standard Hydrogen Electrode (SHE) is used as a reference electrode in electrochemistry. The conditions for SHE include a platinum electrode coated with finely divided platinum black, a temperature of 25°C, a pressure of 1 atm, and a 1M solution of H+ ions typically from HCl. The correct answer is option C, as SHE does not use 1M H2SO4 because it results in a 2M concentration of H+ ions. Options A, B, and D are true statements concerning the SHE.
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