Movement of dispersion medium under the influence of electric field is known as

Options

A. electrodialysis
B. electrophoresis
C. Electroosmosis
D. cataphoresis

Explanation

To solve the question "Movement of dispersion medium under the influence of electric field is known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- The question refers to the "movement of dispersion medium." In chemistry, a dispersion medium is the substance in which particles are dispersed.

2. **Identifying the Influence of Electric Field**:
- The question specifies that this movement occurs "under the influence of electric field." This suggests that the movement is related to an electrical force acting on the particles or the medium.

3. **Recalling Relevant Concepts**:
- In surface chemistry, there are specific terms that describe the movement of particles or mediums under various influences. One such term is "electroosmosis."

4. **Defining Electroosmosis**:
- Electroosmosis is defined as the movement of the dispersion medium (usually a liquid) when an electric field is applied. This phenomenon occurs due to the interaction of the electric field with charged particles in the dispersion medium.

5. **Conclusion**:
- Based on the definition and the context provided in the question, the correct answer is "electroosmosis."

### Final Answer:
The movement of dispersion medium under the influence of electric field is known as **Electroosmosis**.

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