What are protective colloids ? Define and explain gold number .

Gold number is:

Define Gold number.

Name any two protective colloids.

Gold number gives

Write notes on : Protective colloids

One gram of a protective colloid 'X' is to be added to 200ml of gold sol to prevent coagulation of it when 1 ml of 10% NaCl is added. Calculate the gold number of protective colloid 'X'.

When 6xx10^(-5)g of a protective colloid was added to 20mL of a standard gold sol, the precipitation of latter was just prevented on addition of 2mL of 10%NaCl solution. The gold number of a protective colloid is

When 6xx10^(-5)g of a protective colloid was added to 20mL of a standard gold sol, the precipitation of latter was just prevented on addition of 2mL of 10%NaCl solution. The gold number of a protective colloid is

the protective power of the lyophilic colloids es expressed in terms of gold number, a term introduced by Zsigmondy. Gold number is the number of milli - gram of the protective colloid which prevent the coagulation of 10 mLof red gold sol , when 1 mL of a 10 per cent solution of sodium chloride is added to it . thus smaller the gold number of lyophillic colloid, the greater is the protective power. which of the following statement (S) is / are correct?

The ability of the protective colloid is measured in terms of……………….