Q. Alum is added to muddy water because
A) It acts as disinfectant
B) It results in coagulation of clay and sand
C) Clay is soluble in alum, hence removes it
D) It makes water alkaline which is good for health
Explanation
(b)
Alum acts as coagulating agent, so it is used to purify water and separate mud from it.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.