The metallic electrode which does not take part in an electrolytic reaction ? (Inert electrode)

Options

A. Cu
B. Ag
C. Pt
D. Ni

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Electrodes**: In electrolysis, electrodes are crucial components where oxidation and reduction reactions occur. There are two types of electrodes: inert and active.

2. **Definition of Inert Electrode**: An inert electrode is a type of metallic electrode that does not participate in the chemical reactions during electrolysis. Instead, it serves as a conductor for the flow of electricity.

3. **Examples of Inert Electrodes**: The most common example of an inert electrode is platinum. Other examples can include graphite and gold, but platinum is primarily recognized for its inert properties.

4. **Function of Inert Electrodes**: Inert electrodes are used in electrolysis to provide a surface for the reactions to occur without themselves undergoing any change. This means they do not get oxidized or reduced during the process.

5. **Comparison with Active Electrodes**: In contrast, active electrodes (like copper or silver) participate in the electrochemical reactions. For example, a copper electrode can be oxidized or reduced, depending on its role in the electrolysis process.

6. **Conclusion**: Therefore, the metallic electrode that does not take part in an electrolytic reaction is known as an inert electrode, with platinum being the most notable example.

---