Question

At the critical micelle concentration (CMC) the surfactant molecules

(a) associate

(b) dissociate

(c) decompose

(d) become completely soluble

Answer 1

Correct option (a) associate

Explanation :

The soap conc. at which micelles (spherical colloid molecules) first appear is called as critical micellar concentration (CMC). At this condition the surfactant molecules associate with each other.