Question

The formation of micelles takes place only above ______.

Options

• inversion temperature

• Boyle temperature

• critical temperature

• Kraft temperature

Answer 1

The formation of micelles takes place only above kraft temperature.

Explanation:

The Kraft temperature is the minimum temperature at which an ionic surfactant’s solubility reaches the critical micelle concentration (CMC); only above this temperature can micelles form in solution. Other choices (Boyle, critical, inversion temperatures) refer to gas or emulsion phenomena and are not the micelle threshold.