Identify the correct application of electrolysis.

Options

A. Electric fan
B. Electric bell
C. Electrometer
D. Electroplating

Answer

To identify the correct application of electrolysis, we will analyze the options provided and focus on the concept of electrolysis itself.

### Step-by-Step Solution:

1. **Understanding Electrolysis**:
- Electrolysis is a chemical process that uses electricity to cause a chemical change, typically to separate elements from their compounds or to deposit a material onto a surface.

2. **Reviewing the Options**:
- **Option 1**: Electric fan, bi-electric cell, electro-meter, and electro-plating.
- **Option 2**: Electro-plating.

3. **Identifying the Correct Application**:
- Among the options, electro-plating is a process that directly involves electrolysis. In electro-plating, a metal object is coated with a layer of another metal using an electric current, which is the essence of electrolysis.

4. **Conclusion**:
- Therefore, the correct application of electrolysis from the given options is **electro-plating**.

### Final Answer:
- The correct application of electrolysis is **electro-plating**.

---