Which of the following is an emulsion?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Hair cream
An emulsion is a colloid in which both the dispersed phase and the dispersion medium are liquids. Hair cream is such a liquid in liquid system.
Why the other options are incorrect
Option (1) Smoke — Incorrect. Solid particles dispersed in a gas, an aerosol.
Option (3) Paint — Incorrect. Solid particles dispersed in a liquid, a sol.
Option (4) Cheese — Incorrect. A liquid dispersed in a solid, a gel.
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):
Classification Based on Physical State of Dispersed Phase and Dispersion Medium – …
