The dispersion of a liquid in a liquid medium will give

Step 1: Analyze the question The question asks what you get when a liquid (the dispersed phase) is spread through another liquid (the dispersion medium). This is about colloids.

Step 2: The concept A colloid is a mixture where tiny particles of one substance (dispersed phase) are spread through another (dispersion medium). The type depends on the physical states involved:

| Dispersed phase | Medium | Type | Example | |---|---|---|---| | Liquid | Liquid | Emulsion | Milk, palm oil in water | | Liquid | Gas | Aerosol (liquid) | Fog, mist, cloud | | Solid | Gas | Aerosol (solid) | Smoke | | Liquid | Solid | Gel | Jelly, cheese | | Gas | Liquid | Foam | Whipped cream, soap lather | | Solid | Liquid | Sol | Paint, starch in water |

Step 3: Apply to the options

• A. Emulsion: liquid in liquid. This matches.
• B. Fog: liquid droplets in a gas (air). Not a match.
• C. Gel: liquid in a solid. Not a match.
• D. Aerosol: liquid or solid in a gas. Not a match.

Step 4: Answer Dispersing a liquid in a liquid medium gives an emulsion, which is option A.

Exam tip: Think "Emulsion = Equal states (liquid in liquid)". Also remember that fog and aerosol both involve a gas as the medium, and gel involves a solid medium. Emulsions such as oil and water usually need an emulsifying agent (like soap or egg yolk) to stay stable.