Emulsion can be detroyed by :

Options

A. the addition of an emulsifier
B. electrophoresis with a high potential
C. freezing
D. all of these

Answer

**Step-by-Step Solution:**

1. **Understanding Emulsions**: An emulsion is a colloidal system consisting of two immiscible liquids, where one liquid is dispersed in the other. A common example is milk, which contains fat droplets dispersed in water.

2. **Characteristics of Emulsions**: The droplets in an emulsion are larger than those in a sol, and they can be observed under a microscope. The stability of emulsions is influenced by the density difference between the two phases.

3. **Role of Emulsifying Agents**: Emulsions are stabilized by emulsifying agents, such as soap molecules, which form a film around the droplets, providing mechanical stability.

4. **Destruction of Emulsions**: To destroy an emulsion, one can:
- Inactivate or destroy the emulsifying agent by adding a suitable substance.
- Use physical methods such as freezing, which can disrupt the stability of the emulsion.
- Apply high potentials in electrophoresis, which can also destabilize the emulsion.

5. **Conclusion**: Therefore, emulsions can be destroyed by methods such as adding a suitable substance to inactivate the emulsifying agent, freezing, or using electrophoresis at high potentials.