Question

At CMC (critical micelle concentration) the surface molecules:

• A. dissociate
• B. associate
• C. become bigger in size due to adsorption
• D. become smaller in size due to decomposition

Answer 1

Answer: (B)

associate

• The formation of micelles takes place only above a particular temperature called Kraft temperature and above a particular concentration called critical micelle concentration $\left(CMC\right)$.
  
• At CMC the many surface molecules associate to form a colloid and this is called as Associated colloids.