Collidal dispersion have been classified into different types depending upon the physical state
Channel: Doubtnut
Date: 2020-07-12

Collidal dispersion have been classified into different types depending upon the physical state of the dispersed phases and the dispersion medium. They are prepared in the industry or in the laboratory by a number of methods and then purified. The protective action of lyophilic colloids was studied by Zsigmondy and he introduced a term called gold number.  Criticle micelle concentration `(CMC)` of saop solution lies in the range.