Q. A negatively charged suspension of clay in water needs for precipitation the minimum amount of :
A) Aluminium chloride
B) Potassium sulphate
C) Sodium hydroxide
D) Hydrochloric acid
Explanation
(a)
Negatively charged sols require minimum amount of electrolyte having higher valence of cation.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.