MHT CET · Chemistry · Hydrogen

Which of the following is NOT a difficulty in setting SHE?

A To obtain pure hydrogen gas
B To obtain dry hydrogen gas
C To maintain exactly 1 atm pressure
D To bring the reaction in reverse direction

Verified Solution

Answer & Solution

Correct Answer

(D) To bring the reaction in reverse direction

Step-by-step Solution

Detailed explanation

In standard hydrogen electrode (SHE), a platinum plate coated with platinum black is used as electrode. The platinum black is capable of adsorbing large quantities of \(\mathrm{H}_2\) gas. This allows the change from gaseous to ionic form and the reverse process to occur.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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