One of the commonly used electrode is calomel electrode. Under which of the following categories calomel electrode comes ?
- Metal – Insoluble Salt – Anion electrodes
- Oxidation – Reduction electrodes
- Gas – Ion electrodes
- Metal ion – Metal electrodes
The Correct Option is A
Solution and Explanation
Understanding the Calomel Electrode:
The calomel electrode is commonly used as a reference electrode in electrochemical measurements. It consists of mercury (\( \text{Hg} \)) in contact with mercurous chloride (calomel, \( \text{Hg}_2\text{Cl}_2 \)) in a saturated potassium chloride (\( \text{KCl} \)) solution.
Category of the Calomel Electrode:
The calomel electrode falls under the category of "Metal – Insoluble Salt – Anion electrodes" because it involves a metal (\( \text{Hg} \)), an insoluble salt (\( \text{Hg}_2\text{Cl}_2 \)), and the chloride ions (\( \text{Cl}^- \)) in solution.
Conclusion:
The correct answer is Option (1): Metal – Insoluble Salt – Anion electrodes.
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