Q. 14

At high concentration of soap in water, soap behaves as ____________.
A. molecular colloid

B. associated colloid

C. macromolecular colloid

D. lyophilic colloid

Answer :

At low concentration, soap solution behaves as a strong electrolyte. But at high concentration, soap molecules aggregate to form micelles. These are known as associated colloids. So option (ii) is correct.

Molecules having very high molecular masses form macromolecular colloid when dispersed in the suitable dispersion medium. Soap cannot form macromolecular colloid. So (iii) is wrong.


Associated colloids in the form pf micelles contain both lyophobic and lyophilic part. So (iv) is also wrong.


Molecular colloid are of two types – Macromolecular and Multimolecular. A large number of atoms or molecules aggregate to form multimolecular colloids. Example gold sol particles. So, option (i) is not correct.

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