Colloidal solution of silver is prepared by `:`

Options

A. Colloidal milk
B. Double decomposition method
C. Bredig's method
D. Peptization

Explanation

To prepare a colloidal solution of silver, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Colloidal Solutions**:
- A colloidal solution consists of tiny particles dispersed in a medium. In this case, we are focusing on silver particles dispersed in a liquid.

2. **Identifying Preparation Methods**:
- There are various methods to prepare colloidal solutions, including the Bridgman-Arc method, chemical reduction, and electrolysis. However, the question specifically asks for the method used for silver.

3. **Bridgman-Arc Method**:
- The Bridgman-Arc method involves the use of an electric arc to vaporize the metal (silver in this case) and then condense it into fine particles in a surrounding medium (usually water). This method is efficient for producing colloidal solutions of metals like silver, gold, and platinum.

4. **Process of Dispersion and Condensation**:
- The Bridgman-Arc method consists of both dispersion and condensation processes. The electric arc creates a high temperature that vaporizes the silver, and as the vapor cools, it condenses into fine particles that form the colloidal solution.

5. **Conclusion**:
- Therefore, the colloidal solution of silver is prepared by the Bridgman-Arc method, which is a combination of dispersion and condensation processes.

### Final Answer:
The colloidal solution of silver is prepared by the **Bridgman-Arc method**.

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