Q.

Lyophilic sols are more stable than lyophobic sols because

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a

The colloidal particles have no charge.

b

There is a strong electrostatic repulsion between the negatively charged colloidal particles.

c

The colloidal particles are solvated.

d

The colloidal particles have positive charge.

answer is C.

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Detailed Solution

The stability of lyophilic sols is a result of two factors, the presence of a charge and the solvation of colloidal particles. On the other hand, the stability of lyophobic sols is only because of the presence of a charge. Thus, the lyophilic sol is more stable than lyophobic sol due to the extensive solvation.

Hence, option-C is correct.

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