Pick out the wrong statement: Micelles are formed by surfactant molecules above the CMC, The conductivity of a solution having surfactant molecules decreases sharply at the CMC, Lower is the CMC of detergent, more is its detergency, Cleansing action is not related to micelle.

Options

A. Micelles are formed by surfactant molecules above the CMC
B. The conductivity of a solution having surfactant molecules decreases sharply at the CMC
C. Lower is the CMC of detergent, more is its detergency
D. Cleansing action is not related to micelle.

Answer

D

Explanation

Cleaning action is due to micellisation and emulsifying action. Also point (b) is wrong because at cmc, conductivity of soltuion either becomes constant or show a little increase after cmc with increasing , concentration of surfactant.