Question

: Fog is a colloidal solution of?
A.Gaseous particles dispersed in gas
B.Gaseous particles dispersed in liquids
C.Liquid dispersed in gas
D.Solid dispersed in liquid

Answer 1

Hint:You should know that a colloidal is a heterogeneous mixture in which the dispersed particles are the intermediate size between those of a solution and a suspension.

Complete step by step answer:
-Generally a colloidal solution is identified as a colloidal suspension, it is nothing but a mixture in which the substances are regularly suspended in a fluid. A colloid is a minutely small material that is regularly spread out all through another substance. As we know colloidal systems can occur in any of the three key states of matter gas, liquid or solid. A colloidal solution generally refers to a liquid concoction. The distinguishing feature between a true concoction and a colloidal concoction is fundamentally the dimensions of the constituent parts.
-In a colloidal solution, the units are bigger and don’t liquefy, but come to be equally dispersed all through a liquid. As such these units will not pass through a membrane as the liquid does. Colloidal solution of a liquid in a gas is called aerosol.
Examples of colloidal solutions are:
Aerosols: fog, clouds, smoke, dust.
Emulsions: milk, lotion etc.
-Generally any colloid consisting of a solid dispersed in a gas is called smoke. A liquid dispersed in a gas is referred to as a fog. As we can see fog is an example of a colloid of tiny particles of water vapor and air.

> Therefore, Fog is a colloidal solution of liquid dispersed in gas. Hence option C is the required answer.

Note:
Remember that fog is not considered as a solution. As we all know that the solution is transparent since all of its constituents are smaller than wavelengths of visible light and nor is it a true suspension.