Give four uses of emulsion.

Explanation

### Step-by-Step Solution

1. **Definition of Emulsion**:
An emulsion is a mixture of two or more liquids that are normally immiscible (unable to mix). This means that when you combine these liquids, they do not blend together uniformly without the presence of an emulsifying agent.

2. **Use in the Chemical Industry**:
Emulsions are utilized in the chemical industry as cationic and non-ionic emulsifiers. These emulsifiers help in stabilizing the mixtures and are crucial for various chemical processes.

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