To measure the protective action of action of different lyophilic sols quantitatively, the gold number was introduced by Zsig-mondy. It is defined as the minimum number of dry protective colloid which much be added to `10ml` of a specially prepared red gold sol just to prevent a change to vlolet (i.ie an incease in particle size) on the addition of `1ml` of `10` precent sodium chloride solution.A. millimolesB. gramsC. milligramsD. moles

To measure the protective action of action of different lyophilic sols

1.	To measure the protective action of action of different lyophilic sols quantitatively, the gold number was introduced by Zsig-mondy. It is defined as the minimum number of dry protective colloid which much be added to `10ml` of a specially prepared red gold sol just to prevent a change to vlolet (i.ie an incease in particle size) on the addition of `1ml` of `10` precent sodium chloride solution.A. millimolesB. gramsC. milligramsD. moles
Answer» Correct Answer - C The weight in milligrams of protective colloid that prevents the coagulation of `10mL` of a given sol on adding `1mL` of a `10%` solution `NaCl` is called gold number.