How emulsions are classified ? Give one example for each type of emulsion.

Explanation

Emulsion : The colloidal system in which a dispersion of finely divided droplets of a liquid in another liquid medium is called Emulsion.
Ex : Milk
In Milk, the droplets of liquid fat are dispersed in water. This is an example for oil in water type emulsion.
Classification of emulsions : Emulsions are classified into two classes. These are
a) oil in water (O/W) and
b) water in oil (W/O), (O = Oil, W = Water).
These emulsions are classified as such depending on which is dispersed phase and which is dispersion medium.a) Oil in Water (O/W) type emulsions : tn this type of emulsions, the disperse d phase is and the dispersion medium is water.
Ex : Milk, liquid, fat (oil) in water. Vanishing cream, fat in water.
b) Water in Oil (W/O) type emulsions : In this type of e mulsions, the dispersed phase is water and the dispersion medium is oil.
Ex : Stiff greases water in lubrication oils Cod liver oil water in cod liver oil Cold cream water in fat of Emulsions : Emulsions are useful
`to` In the digestion of fats in intestines.
`to` In washing processes of clothes and crockery.
`to` In the preparation of lotions, creams, ointments in pharmaceutical and cosmetics.
`to` In the extraction of metals (froth flotation).
`to` In the conversion of cream into butter by churning.
`to` To break oil and water emulsions in oil wells.
`to` In the preparation of oily type of drugs for easy adsorption to the body.