What is the difference between a colloid and a solution?
A colloid is a substance wherein minute, microscopically dispersed insoluble debris of a substance is suspended in some other substance. The length of colloidal debris varies from 1-1000. A solution exists in a single-phase only, and no visible interface exists. Whereas in a colloid, unique phases, particularly the dispersed section and dispersion medium, exist. An interface among them may be observed.