Question

Which ones are examples of solid sol?
This question has multiple correct options.
A ) Black diamond
B ) vision glasses
C ) photochromatic glasses
D) Ruby stone

Answer 1

Hint: A solid sol is the colloidal solution in which dispersed phase (solute) and the dispersion medium (solvent) both are in solid phase.

Complete answer:
A colloidal solution is a heterogeneous mixture containing minute particles of one substance dissolved in another substance. The diameter of these minute particles is in the range of 1-1000 nm. These minute particles remain suspended and do not settle at the bottom. Dispersed phase is the substance which is dispersed in the solution. The dispersion phase is the medium in which the dispersed phase is dispersed. Based on the physical states (solids, liquid and gas) of the dispersed phase and the dispersion medium, colloidal solutions are classified into eight types. Out of these eight types, solid soil is one such type, in which both dispersion medium and the dispersed phase are in the solid state. Black diamonds, vision glasses, photochromatic glasses and ruby stone are examples of solid soils.

Hence, all the four options A ), B ), C ) and D) are correct answers.

Note: Alloys, coloured glasses and gemstones are usual examples of solid sol. In these colloidal solutions, both dispersion medium and the dispersed phase are in the solid state.