Mention two uses of emulsions.

Explanation

Uses of emulsions in various fields are given below.
1. In medicines. A wide variety of medicinal and pharmaceutical preparations are emulsions. It is belived that in this form they can be more effective and are easily assimilated.
2. In disinfectants. The disinfectants such as dettol and lysol give emulsions of the oil-in-water type when mixed with water.
3. In metallurgical operations. Emulsions play an important role in industry. The metal ores are concentrated by froth-floatation process which involves the treatment of the pulverised ore in emulsion of pine oil.
4. Building roads : Asphalt emulsified in water is used for building roads without the necessity of melting the asphalt.
5. In food : Many food items like milk, cream are also emulsions.
6. In cosmetics. Most of the creams (vanishing cream, cold cream) and skin lotions are emulsions.