Emulsions are also called the colloidal solutions in which the disperse phase as well as dispersion medium are liquids. It may be oil-in-water or water-inoil type Emulsifiers can be sued to stabilize the emulsion. Soaps, detergents, proteins, and gums are used as emulsifiers.
Emulsion can be destroyed by (more than one correct)

Options

A. The addition of emulsifier which tends to form another emulsion
B. Electrophorsis with high potential
C. Freezing
D. All

Answer

To solve the question regarding how emulsions can be destroyed, we need to understand the nature of emulsions and the methods that can be used to destabilize them. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand Emulsions
Emulsions are colloidal mixtures where both the disperse phase and the dispersion medium are liquids. They can be classified into two types: oil-in-water (O/W) and water-in-oil (W/O). Emulsions are stabilized by emulsifiers such as soaps, detergents, proteins, and gums.

**Hint:** Recall that emulsions consist of two immiscible liquids and require emulsifiers for stability.

### Step 2: Identify Methods to Destroy Emulsions
To destroy an emulsion, we need to disrupt the stability provided by the emulsifiers. The question suggests that there are multiple methods to achieve this.

**Hint:** Think about physical changes or processes that can separate the components of a mixture.

### Step 3: Evaluate the Options
1. **Addition of Emulsifier**: This would actually stabilize the emulsion rather than destroy it. Therefore, this option is incorrect.
2. **Electrophoresis**: This method involves applying an electric field to the emulsion, which can cause the disperse phase and dispersion medium to separate based on their charge. This is a valid method to destroy the emulsion.
3. **Freezing**: Cooling the emulsion can lead to the separation of its components as one of the phases may solidify, thus destroying the emulsion. This is also a valid method.
4. **Heating**: Similar to freezing, heating can cause the components to separate due to changes in solubility and viscosity, thus destroying the emulsion. This is also a valid method.

**Hint:** Consider how temperature changes can affect the physical state and interactions of the components in an emulsion.

### Step 4: Conclusion
Based on the evaluation of the methods:
- **Electrophoresis** (Option B) is a correct method to destroy emulsions.
- **Freezing** (Option C) is also a correct method to destroy emulsions.
- **Heating** could also be considered correct, but it was not listed as an option in the question.

Thus, the correct answers are **Option B (Electrophoresis)** and **Option C (Freezing)**.

**Final Answer:** Emulsions can be destroyed by **Electrophoresis** and **Freezing**.