Q. Gold number gives
A) The amount of gold present in the colloid
B) The amount of gold required to protect the colloid
C) The amount of gold required to break the colloid
D) None of the above
Explanation
(b)
Gold number is defined as “the minimum amount of protective colloid in milligrams required to just prevent the coagulation of a 10 mL of a given gold sol, when 1 mL of a 10% solution of sodium chloride is added to it.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.