Question

Milk is an emulsion in which liquid ________ is the dispersed phase and _______ is the dispersion medium.

• A. fat
• B. water

Answer 1

Milk is an emulsion in which fat droplets or liquid fat is dispersed in the water as the dispersion medium.

Colloids: A colloid is a heterogeneous mixture in which the size of the particles is so small that the particles cannot be seen with the naked eye.

• The diameter of the particles of colloids lies in the range of 10^-6 and 10^-9 m.
• These particles can scatter a beam of light passing through them and make the path of light visible. This is known as the Tyndall effect.
• Examples of colloids: Milk, mist, etc.

Emulsion: A type of colloid in which the dispersed phase is a liquid and the dispersion medium is also a liquid. Examples: Milk, face cream, etc.

• Dispersed phase: The phase which consists of the colloidal particles present in the smaller quantity.
• Dispersion medium: The phase in which the particles are dispersed and are present in a larger quantity.

Therefore, milk is an emulsion in which liquid fat is the dispersed phase and water is the dispersion medium.