Question
Chemistry Question on Colloids
The protecting power of lyophilic colloidal sol is expressed in terms of:
A
Gold number
B
Critical miscelle concentration
C
Oxidation number
D
Coagulation value
Answer
Gold number
Explanation
Solution
Lyophobic sols are unstable, they are stabilised by adding some lyophilic colloids which protect them from precipitation. Hence lyophile colloids are called protecting colloids. Their protecting power is expressed in terms of gold number