Question

Substances which behave as normal electrolytes in solution at low concentration and exhibit colloidal properties at higher concentration are called:

• A. lyophilic colloids
• B. lyophobic colloids
• C. macromolecular colloids
• D. associated colloids

Answer 1

The correct option is D associated colloids

• Associated colloids are 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 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.