Collidal dispersion have been classified into different types depending upon the physical state of
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.  Which of the following has minimum gold number?