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.
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.
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