Question

The efficiency of a surfactant towards detergency depends upon its :

• A. CMC
• B. Kraft temperature
• C. nature of hydrophilic and hydrophobic core
• D. all of these

Answer 1

The correct option is D all of these

The Kraft temperature (also known as Kraft point or critical micelle temperature) is the minimum temperature at which surfactants begin to dissolve (if the sample concentration is below the CMC) and in some cases, form micelles (if the sample concentration is above the CMC). Kraft point can be also regarded as the temperature at which micelles become soluble (in the case of surfactant concentration is above the CMC value). Below the Kraft temperature, there is no value for the critical micelle concentration (CMC), i.e., micelles cannot form. A surfactant with a low Kraft point is more soluble than a surfactant with a high Kraft point.

So, efficiency of a surfactant towards detergency depends upon all of these factors.