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

To solve the question regarding the purification of colloidal particles from crystalloid dimensions through a semipermeable membrane, we need to identify the correct term that describes this process.

### Step-by-Step Solution:

1. **Understanding Colloidal and Crystalloid Particles**:
- Colloidal particles are larger than true solution particles (crystalloid) and typically range from 1 nm to 1000 nm in size. True solutions consist of solute particles that are less than 1 nm.

2. **Identifying the Process**:
- The process of separating colloidal particles from smaller crystalloid particles involves using a semipermeable membrane. This membrane allows smaller particles (like those in a true solution) to pass through while retaining larger colloidal particles.

3. **Defining the Process**:
- The specific process that achieves this separation is called **dialysis**. In dialysis, impurities that are water-soluble (and thus in true solution form) can pass through the semipermeable membrane, while the larger colloidal particles remain on one side.

4. **Conclusion**:
- Therefore, the purification of colloidal particles from crystalloid dimensions through a semipermeable membrane is known as **dialysis**.

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