Q. Milk is an example of:

Correct Answer: d) Emulsion

Explanation:

Milk is an example of an emulsion, which is a type of colloid where tiny droplets of one liquid are dispersed in another liquid that is immiscible (does not mix). In the case of milk, it is an emulsion of fat droplets dispersed in water. The fat and water do not naturally mix, but milk contains emulsifying agents (like proteins) that stabilize the mixture.

Here’s why the other options are incorrect:

– a) Foam: A foam is a colloid where gas is dispersed in a liquid or solid (e.g., whipped cream or foam on beer). Milk is not a foam.

– b) Sol: A sol is a colloid where solid particles are dispersed in a liquid (e.g., paint or muddy water). Milk does not fit this description.

– c) Aerosol: An aerosol is a colloid where solid or liquid particles are dispersed in a gas (e.g., fog or smoke). Milk is not an aerosol.