Question

(e) Stability of lyophobic solution is due to:-
(i) the electrical charge present on the
colloidal particles
(ii) solvation
(iii) both the electrical charge present
the colloidal particles and
solvation
(iv) the size of the colloidal particles.
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Answer 1

Answer:

Lyophilic sols are more stable than lyophobic sols. This is due to the fact that lyophilic colloids are extensively solvated, i.e., colloidal particles are covered by a sheath of the liquid in which they are dispersed.

Lyophilic colloids have a unique property of protecting lyophobic colloids.

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.

Lyophilic colloids used for this purpose are called protective colloids.

Hence, option C consisting of the first three statements regarding the stability of sol is the right answer.