Question
Question: Alum is a water purifier because it....
Alum is a water purifier because it.
A
Coagulates the impurities
B
Softens hard water
C
Gives taste
D
Destroys the pathogenic bacteria
Answer
Coagulates the impurities
Explanation
Solution
Alum contains many cations and water has many anionic impurities. On adding alum coagulates the suspended impurities and make water fit for drinking purposes.