Question

The degree of protection of a lyophobic colloid by the addition of a lyophilic colloid is measured in terms of :
A. Gold number
B. Coagulation value
C. Sedimentation
D. None of these

Answer 1

Correct Answer - A
Gold number is the amount of lyophilic in mg which just protect 10 mL gold sol against coagulation by 1 mL of 10% NaCl solution. It is a measure of protectivey power of lyophilic colloid.