Permanent hardness of water can be removed by adding:
A. Chlorine
B. Washing Soda
C. Potassium Permanganate
D. Bleaching Powder
Answer: Option B
Solution(By Examveda Team)
Temporary hardness is due to presence of soluble bicarbonates of calcium and magnesium and permanent hardness is due to the presence of chlorides and sulphate of calcium and magnesium.This Question Belongs to General Knowledge >> General Science
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