Question

Give one example each of ‘oil in water’ and ‘water in oil’ emulsion.

Answer 1

Emulsions are the combinations of at least two sorts of liquids where, one is, for example, droplets or even ultramicroscopic size, which are circulated all through one another. These are generally formed from the part of liquids either in common structure or, all the more frequently, utilizing mechanisms.

Complete answer:
A colloidal system in which one liquid is scattered in another liquid immiscible with it is called an emulsion.
Sorts of emulsion:
1. Emulsion of oil in water: In this sort of emulsion, the oil will be the dispersed phase and water will be the dispersion medium. The best example for o/w emulsion is milk. In milk, the fat globules (which go about as the scattered stage) are suspended in water (which goes about as the scattering medium).Dispersion phrase is oil and the dispersion medium is water.
For example, milk consists of fluid fat particles scattered in water.
2. Emulsion of water in oil: In this sort, water will be the scattered stage and oil will be the scattering medium. Margarine (a spread utilized for seasoning, heating and working) is a case of water in oil emulsion. Dispersion phrase is water and the dispersion medium is oil.
For example, cod liver oil comprises particles of water scattered in oil.

Note:
To prevent the mixture from separating substances called emulsifiers can be added. These help to form and stabilize the emulsions, preventing or slowing the water and fat/oil from separating.