The purification of the colloidal particles from crystalloid dimensions through semipermeable membrane is known as:

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of the process used to purify colloidal particles from crystalloid dimensions using a semipermeable membrane.

2. **Identifying the Process**: The process that fits this description is known as **dialysis**. Dialysis involves the separation of smaller particles (such as impurities) from larger colloidal particles through a semipermeable membrane.

3. **Explanation of Dialysis**: In dialysis, a colloidal solution containing dispersed phase particles and impurities is placed in a container with a semipermeable membrane. The membrane allows smaller particles (the crystalloid impurities) to pass through while retaining the larger colloidal particles.

4. **Comparison with Other Processes**:
- **Coagulation**: This process involves the aggregation of colloidal particles to form a precipitate and is not a purification method.
- **Ultrafiltration**: While it is a method to purify colloids, it does not specifically use a semipermeable membrane in the same context as dialysis.
- **Peptization**: This process refers to the conversion of a precipitate into a colloidal solution and does not relate to purification.

5. **Conclusion**: Based on the explanation and comparison, the correct answer to the question is **dialysis**.

**Final Answer**: The purification of the colloidal particles from crystalloid dimensions through a semipermeable membrane is known as **dialysis**.

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