Question

Colloid is a _________________ (homogeneous/heterogeneous) mixture.

Answer 1

Colloids

• Colloids are heterogeneous mixtures.
• Every colloid contains two parts - colloidal particles (dispersed phase) and dispersing medium.
• The particles of colloids (solid or liquid) will have an intermediate size between suspension and solution particles.
• The particles of colloids do not dissolve but get dispersed in the medium.
• The particles can scatter light due to their large size of the particles.
• For instance, we are able to observe the light from car headlamps through fog.

Examples of colloids:

• Milk (dispersed phase: liquid; dispersed medium: liquid)
• Fog (dispersed phase: solid; dispersed medium: gas)
• Insecticide sprays (dispersed phase: solid; dispersed medium: gas)