MCQ
Example of an intrinsic colloid is:
  • A
    $\mathrm{As}_2 \mathrm{~S}_3 \mathrm{sol}$
  • B
    $S$ sol
  • Egg albumin
  • D
    $\mathrm{Fe}(\mathrm{OH})_2 \mathrm{sol}$

Answer

Correct option: C.
Egg albumin
Based on the nature of the interaction between the dispersed phase and the dispersion medium:
Colloids are classified into two categories$-$lyophilic and lyophobic.
$(a)$ Colloidal solutions in which the dispersed phase has a great affinity or love for the dispersion medium are termed lyophilic colloids. Such substances have a tendency to pass directly into colloidal solution when brought in contact with the dispersion medium. The lyophilic colloids are also called intrinsic colloids. Egg$-$albumin is an inherent or essential sol.
$(b)$ Lyophobic colloids: Substances which when mixed with the dispersion medium do not form the colloidal sol but their sols can be prepared by special methods.
They are also called extrinsic colloids. Example: Sols of metal sulfides, sols of metallic hydroxides, etc.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free