Which of the following is an example of liquid gas aerosol?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Fog
An aerosol has a gas as the dispersion medium. When the dispersed phase is a liquid, the colloid is a liquid-in-gas aerosol: fog, mist, cloud and insecticide sprays are the examples. In fog, tiny water droplets are dispersed in air. Froth is a foam (gas in liquid), paints are a sol (solid in liquid) and hair cream is an emulsion (liquid in liquid).
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.
NCERT (Pre-rationalised edition, 2022-23):
Types of Colloidal Systems (rows)
| Dispersed phase | Dispersion medium | Type of colloid | Examples |
|---|---|---|---|
| Solid | Liquid | Sol | Paints, cell fluids |
| Liquid | Liquid | Emulsion | Milk, hair cream |
| Liquid | Gas | Aerosol | Fog, mist, cloud, insecticide sprays |
| Gas | Liquid | Foam | Froth, whipped cream, soap lather |