Question

The critical micelle concentration (CMC) is defined as:

• A. the concentration at which micellization starts
• B. the concentration at which micelle starts behaving like an electrolyte
• C. the concentration at which dispersed phase is separated from dispersion medium
• D. the concentration at which a colloid is converted to suspension

Answer 1

The correct option is A the concentration at which micellization starts

• Associated colloids are some substances which at low concentrations behave as normal strong electrolytes, but at higher concentrations exhibit colloidal behaviour due to the formation of aggregates.
  
• The aggregated particles thus formed are called micelles.
  
• The formation of micelles takes place only above a particular temperature called Kraft temperature and above a particular concentration called critical micelle concentration $\left(CMC\right)$.