Q.Choose the correct option.
Fruit Jam is an example of-
a. sol
b. gel
c. emulsion
d. true solution

Colloids are classified in three independent ways. By physical state of dispersed phase and dispersion medium: eight combinations are possible, giving solid sols (e.g. coloured glass), sols/gels (e.g. paints, muddy water), aerosols (solid- or liquid-in-gas, e.g. smoke or fog), emulsions (liquid-in-liquid, e.g. milk), and foams (gas-in-liquid or gas-in-solid, e.g. whipped cream, foam rubber). By affinity between the phases: lyophilic colloids (particles with strong affinity for the medium, e.g. starch, gum) are reversible, self-stabilised and hard to coagulate; lyophobic colloids (little/no affinity, e.g. Ag, Au sols, metal-hydroxide sols) are irreversible, unstable without added stabilisers, and coagulate easily. By molecular size: multimolecular colloids are aggregates of many small atoms/molecules held by van der Waals forces (e.g. a gold sol, S8 sulfur); macromolecular colloids are single molecules already large enough to be colloidal (e.g. starch, …