Question

Fog is an example of a colloidal system with liquid dispersed in gas.
A. True
B. False

Answer 1

‌ In order to answer the question, first we have to know about the composition and the state of Fog. And, also check whether the property of Fog is satisfying the condition of the Colloidal System in a liquid aerosol or not.

Complete step by step answer:
Yes, Fog is an example of a colloidal system with liquid dispersed medium is gas.
It is an aerosol of liquid. The dispersed phase is liquid and the dispersion medium is gas.
When a colloidal system in which the dispersed phase is composed of either solid or liquid particles, and in which the dispersion medium is a gas, then it is said to be liquid aerosol.
And, we all know fog is in a liquid state dispersed in a gaseous medium, so fog is also a liquid aerosol in a colloidal system. Or in other words, fog is a visible liquid aerosol consisting of tiny water droplets or ice crystals suspended in the air.
Hence, the correct option is A. True.

Note: Fog and mist, both are an example of colloidal system with liquid dispersed in gas or we can say that both are an example of liquid aerosol but the only difference between both fog and mist is that fog reduces visibility to less than 1 kilometre, whereas mist causes lesser impairment of visibility.