Question

Disperse phase and dispersion medium in butter are respectively:
(A) Solid and liquid
(B) Liquid and solid
(C) Liquid and liquid
(D) Solid and solid

Answer 1

Hint: Butter is a type of dairy product which contains butterfat up to 80%, which is solid in state when preserved in a cooled environment or at room temperature. It is an example of solid emulsion type colloid.

Complete step by step solution:

A colloidal solution having both the dispersion medium and dispersed phase are in liquid state is called an Emulsion.
A colloid in which the dispersed phase in liquid state and the dispersion medium is a solid state is called Gels.

A colloidal dispersion is a two-phased system in which particles of one phase are dispersed throughout a medium that is in a different phase. In other words, it is composed of a dispersion medium and a dispersed phase.
The continuous medium in which the dispersed phase is distributed throughout is called dispersion medium. Water in milk is an example of dispersion medium.
The phase that is composed of particles that are distributed through another phase is called the dispersed phase. Dust particles (in air) is an example of dispersed phase.
Butter has a dispersion medium that is Solid and a dispersed phase is Liquid.
So, the correct option is (b).

Note: To determine whether a mixture is colloidal or not we can use Tyndall Effect. When a source light is shined through a true solution, the substance in the dispersed phases scatters the light in all directions, making it readily seen.