Q. Which of the following is the best protective colloid?
A) Gelatin (Gold no.=0.005)
B) Gum Arabic (Gold no. =0.15)
C) Egg albumin (Gold no.=0.08)
D) None of the above
Explanation
(a)
Protective power of colloid
$\propto \frac{1}{gold\ number}$
$\therefore$ Gelatin has lowest gold number among given choices.
$\therefore$ Gelatin is best protective colloid.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.