Q49
Permanent hardness of water can be removed by adding:
A.
Chlorine
B.
Washing Soda
AnswerC.
Potassium Permanganate
D.
Bleaching Powder
Answer: Option B
Solution
Answer: Option B
Solution:
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.