Question

Which type of colloid butter is?
1. Aerosol
2. Foam
3. Gel
4. Sol

Answer 1

Correct Answer - Option 3 : Gel

Explanation:

• A colloid is a mixture of insoluble suspended particles of the dispersed medium in any dispersion phase.
• They are commonly known as colloidal solutions.
• Examples - Shampoos, Perfumes, Paints, etc.

Types of colloid

Dispersed Phase	Dispersion Medium	Type of Colloid	Examples
Solid	Solid	Solid Sol	Some colored glasses, Gemstones
Solid	Liquid	Sol	Paints, Cell fluids
Solid	Gas	Aerosol	Smoke, Dust
Liquid	Solid	Gel	Cheese, Butter, jellies
Liquid	Liquid	Emulsion	Milk, Hair Cream
Liquid	Gas	Aerosol	Fog, Mist, Cloud, Insecticide Sprays
Gas	Solid	Solid Sol	Pumice stone, Foam rubber
Gas	Liquid	Foam	Froth, Whipped cream, soap lather

•  Colloidal suspension with solid dispersed in a liquid is known as Sol. 
• A gel is a colloidal solution where liquid particles are dispersed in a solid.
• The liquid in another liquid solution is known as Emulsion.
• Foam is formed due to the dispersion of many gaseous particles in a liquid or in a solid.
• Aerosol is the result of solid or liquid dispersion within a gas.  

Colloidal Solutions	Size of Particles
Sol	0.01-1 nm
Gel	270- 334  nm
Emulsion	200-100000 nm
Foam	163000-400000 nm
Aerosol	1000-12000 nm