When a freshly precipitated substance is converted into a colloidal solution with the help of a third substance, the process is known as

Options

A. Coagulation
B. Peptization
C. Electrodispersion
D. Dialysis

Explanation

To solve the question, we need to understand the terms related to the conversion of freshly precipitated substances into colloidal solutions.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Coagulation**: This is the process where colloidal particles aggregate to form larger particles, often leading to the separation of the colloid.
- **Peptization**: This is the process of converting a precipitate into a colloidal solution by the addition of a dispersing agent (the third substance).
- **Electrodispersion**: This refers to the dispersion of a solid into a colloidal solution by applying an electric field.
- **Dialysis**: This is a separation process that uses a semipermeable membrane to separate small solute particles from larger colloidal particles.
- **Char of Sandeva**: This term does not relate to the context of colloidal solutions.

2. **Identifying the Correct Process**:
- Since the question specifically mentions converting a freshly precipitated substance into a colloidal solution with the help of a third substance, we focus on the definition of peptization.

3. **Conclusion**:
- The correct answer to the question is **Peptization**.

### Final Answer:
The process is known as **Peptization**.

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