Concept explainers
Interpretation:
A colloid formed from a gas dispersed in a liquid needs to be determined.
Concept introduction:
Colloid: A colloid is a heterogeneous mixture containing two phases where one phase is dispersed in another phase. By changing the nature of dispersed phase and dispersion medium, various number of colloids were reported.

Answer to Problem 58A
Whipped cream or shaving cream is an exampleof a colloid formed when a gas dispersed in a liquid.
Explanation of Solution
A colloid is a heterogeneous mixture containing two phases where one phase is dispersed in another phase. Here the dispersed phase is gas and the dispersion medium is liquid. Such a colloid iswhipped cream or shaving cream here gas dispersed in a liquid.
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