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प्रश्न
Give reason for the following:
Lyophilic colloidal solutions are more stable than lyophobic colloidal solutions.
उत्तर
Lyophilic colloidal solutions are more stable than lyophobic colloidal solutions because lyophilic colloids are extensively solvated, i.e., the colloidal particles are covered by a sheath of the liquid in which they are dispersed. When a lyophilic sol is added to the lyophobic sol, the lyophilic particles form a layer around lyophobic particles and, thus, protect the latter from electrolytes. In lyophilic colloids, disperse phase has a high affinity for dispersion medium whereas in lyophobic colloids, disperse phase has a low affinity for dispersion medium.
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