Milk is a colloidal system in which:
(1) Water is dispersed in fat
(2) Fat is dispersed in water
(3) Fat and water are dispersed in each other
(4) Fat is dissolved
Answer: (2) A colloid is a substance microscopically dispersed evenly throughout another substance. A colloidal system consists of two separate phases: a dispersed phase (or internal phase) and a continuous phase (or dispersion medium) in which the colloid is dispersed. A colloidal system may be solid, liquid, or gas. Milk is an emulsified colloid of liquid butterfat globules dispersed within a water-based solution.
