Q. Gold numbers of protective colloids $A,\ B,\ C\ and\ D$ are 0.50, 0.01, 0.10, and 0.005, respectively. The correct order of their protective powers is
A) $D < A < C < B$
B) $C < B < D < A$
C) $A < C < B < D$
D) $B < D < A < C$
Explanation
(c)
Higher the gold number, lesser will be the protective power of colloid.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.