Q. Which electrolyte is least effective in causing coagulation of +ve ferric hydroxide sol?
A) $KBr$
B) $K_{2}SO_{4}$
C) $K_{2}CrO_{4}$
D) $K_{2}\lbrack Fe(CN)_{6}\rbrack\$
Explanation
(a)
Lesser valence of $Br^{-}$ is responsible for least effective nature.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.