Question

Explain the following with one example :

Emulsion

Answer 1

Mixtures are classified into colloids, suspension and true solution depending on the property of the substances.

• Emulsion belongs to the category of colloids.
• Colloids are substances where 1-1000 nm sized particles dispersed in the medium
• The particles which are dispersed in the medium are called dispersed phase and the medium in which the particles are dispersed is called the dispersion medium.
• Depending on the states of the dispersed phase and dispersion medium, different types of colloids are present.
• In emulsion, both the dispersed phase and dispersion medium are in liquid states.
• Colloids can show Tyndall effect. i.e.., when the light passed through the colloidal solution path of light becomes visible due to the scattering of light by the dispersed particles.
• Example: milk (fat globules are dispersed in water which is the dispersion medium).