Question

Dispersed phase and dispersion medium in butter are respectively:
A. Solid and liquid
B. Liquid and liquid
C. Liquid and solid
D. Solid and solid

Answer 1

Hint: Colloids have been classified on the basis of the dispersed phase, and dispersed medium. These mediums can exist in solid, liquid, or gaseous phase. We know the nature of solid, on the basis of that we can determine the dispersed phase, and dispersion medium in butter.

Complete step by step answer:
-First, let us define the dispersed phase, and the dispersion medium. As mentioned, colloids have been classified on the basis of it; that classification includes sol, foam, aerosol, emulsion, solid sol etc.
-Now, if we define the dispersion medium, it consists of two medium; that are distinct in nature. It can be of any phase liquid, solid, or a gas.
-Talking about the dispersed phase in colloids, it is basically that phase which is scattered in the form of colloidal particles.
-In other terms, we can say that dispersion medium is the medium in which there is dispersion of colloidal particles.
-Now, if we talk about the given colloid, i.e. butter. It represents the two types one is solid emulsion, and other is emulsion; but mainly it is a type of solid emulsion type of colloid.
-In solid emulsion, the dispersed phase is liquid, and the dispersion medium is solid.
Thus, in the last we can conclude that dispersed phase, and dispersion medium in butter are liquid, and solid respectively.
Hence, the correct option is (C).

Note: Don’t get confused while assigning the dispersed phase, and dispersion medium. We know that butter exists in solid form, and it contains about 80 to 90% of solid, so its dispersion medium is solid, the liquid particles are kind of scattered i.e. dispersed phase.