Question

Butter is an example of which type of colloid?
(A) Solid in liquid
(B) Liquid in solid
(C) Liquid in liquid
(D) Gas in liquid

Answer 1

Hint:Colloids are considered to be heterogeneous mixtures; it means that small particles of a substance are dispersed in dispersion medium. Colloids are classified on the basis of dispersed phase, and dispersion medium. Butter is an example of gel colloid. Now, identify the dispersed phase, and the dispersion medium.

Complete step by step solution:
> First, let us know about the classification of colloids on the basis of dispersed phase, and dispersion medium.
Thus, the classification includes foam, solid foam, aerosol, emulsion, gel, solid aerosol, sols, and solid sols.
> Now, if we look at the given options; the first is solid in liquid. It means the solid is the dispersed phase, and liquid is the dispersion medium. It is also known as sols, and found in paints, inks.
- The second option is liquid in solid. It means that the liquid is the dispersed phase, and solid is the dispersion medium. It is known as gel, and found in butter, cheese, and curd.
- The third option is liquid in liquid. In this case, the dispersed phase, and dispersion medium is liquid, known as emulsion. It is found in butter, milk, cream.
- The fourth option is gas in liquid. It means gas is the dispersed phase, and liquid is the dispersion medium. It is known as foam, and found in soda water, froth.
Thus, in the end we can conclude that the butter is an example of liquid in a solid type of colloid.

Hence, the correct option is (B).

Note: Don’t get confused while defining the substance on the basis of dispersed phase, and the dispersion medium. Just remember that the dispersed phase is the small amount of substance. Like in the case of butter, we know that liquid is present in small amounts, and the butter exists in solid state.