gold Number and protective power of Lyophilic colloids

The protective power of lyophilic sol is

Assertion : Lyophilic colloids such as starch, gelatin etc, act as protective colloids. Reason : Protective power of lyophilic coloids is expressed in terms of gold number.

Greater is the protective power of lyophilic colloid

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?

The protecting power of lyophilic colloidal sol is expressed in terms of

Which is not lyophilic colloid ?