Question:
Platinum electrode surrounded by an outer tube, in which hydrogen passes entering through side inlet and escaping at the bottom through the test solution, is called as:
Platinum electrode surrounded by an outer tube, in which hydrogen passes entering through side inlet and escaping at the bottom through the test solution, is called as:
Updated On: Feb 24, 2026
- Silver electrode
- Calomel electrode
- Standard hydrogen electrode
- Indicator electrode
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The Correct Option is C
Solution and Explanation
The question at hand asks about an electrode setup involving a platinum electrode, hydrogen gas, and a test solution, with hydrogen entering and escaping in a specific manner. This setup aligns perfectly with the description of a Standard Hydrogen Electrode (SHE).
Let's explore why the Standard Hydrogen Electrode is the correct choice among the given options:
-
Concept of Standard Hydrogen Electrode (SHE):
- The SHE consists of a platinum electrode as a base, which is immersed in an acidic solution where the concentration of H3O+ ions is 1 M.
- Hydrogen gas is bubbled through the solution at a pressure of 1 atm. The platinum electrode allows for the absorption or release of H2 gas at its surface, establishing an equilibrium between H2 and H+ ions in the solution.
- SHE is used as a reference electrode in electrochemical cells, having a standard electrode potential of 0.00 V by definition.
-
Comparison with Other Options:
- Silver electrode: Typically used for reference or specific redox reactions involving silver but does not involve hydrogen gas or setup described.
- Calomel electrode: A different type of reference electrode that involves mercury and a chloride ion, not hydrogen gas.
- Indicator electrode: Generally refers to an electrode used in potentiometric analysis to indicate the endpoint of a titration, does not match description involving hydrogen gas or platinum.
- Conclusion: Based on the setup's description and its use as a reference electrode, the configuration matches the Standard Hydrogen Electrode. Hence, Standard Hydrogen Electrode is the correct answer.
Therefore, the correct answer is: Standard Hydrogen Electrode.
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