Match List I with List II.
| List I (Example of colloidal system) | List II (Types of colloid) |
| A. Smoke | I. Foam |
| B. Cheese | II. Aerosol |
| C. Soap lather | III. Emulsion |
| D. Milk | IV. Gel |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A-II, B-IV, C-I, D-III
The type of colloid is named from the physical states of the dispersed phase and the dispersion medium:
A. Smoke — This matches II. Aerosol. Solid particles dispersed in a gas.
B. Cheese — This matches IV. Gel. A liquid dispersed in a solid.
C. Soap lather — This matches I. Foam. A gas dispersed in a liquid.
D. Milk — This matches III. Emulsion. Liquid fat dispersed in water, a liquid in a 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):
Classification Based on Physical State of Dispersed Phase and Dispersion Medium – …
