Question

Above CMC, the surfactant molecules undergo:

• A. dissociation
• B. aggregation
• C. micelle formation
• D. All of these

Answer 1

Answer: (B), (C)

The correct options are
B aggregation
C micelle formation

Colloids which behave as normal electrolytes at low concentration, but exhibit colloidal properties at higher concentration due to the formation of aggregated particles called micelles are referred to as associated colloids. The micelles are formed by the association of dispersed particles above a certain concentration and certain minimum concentration is required for the process of aggregation to take place.