Question

Milk is an example for:
(A) inelastic gel
(B) foam
(C) elastic gas
(D) emulsion

Answer 1

Hint: Milk is basically the fat globules dispersed in the medium of liquid; specifically, oil in water. We can call milk a suspension or a colloid or an emulsion as well.

Complete answer:
Let us see the milk and its properties in detail-
Emulsion is formed when both the dispersed phase and the dispersion medium are the liquids in the colloidal system. Here, the two immiscible or partially miscible liquids are mixed to form an emulsion. They show Brownian movement and Tyndall effect as well.
Milk is an example of emulsion, purely. The word ‘emulsion’ is a Latin word meaning ‘to milk’. The principal constituents of milk are fat, water, proteins, lactose and minerals. Hence, it also can be called as suspension but not solution as the solution has only two phases mixed together.
As of now, milk is an example of emulsion.

Therefore, option (D) is correct.

Note:
Do note that milk can never be a gas; either elastic or non-elastic. So, option (C) can never be the answer. Inelastic gel describes the property of semi-solid; milk cannot be a semi-solid. Thus, option (A) can also never be the answer. Also, foam describes the gas bubbles dispersed in liquid. Thus, our answer can also not be the option (B).