Q34
Permanent hardness of water may be removed by the addition of:
A.
Sodium Carbonate
AnswerB.
Alum
C.
Potassium Permanganate
D.
Lime
Answer: Option A
Solution
Answer: Option A
Solution:
Temporary hardness can be removed by boiling or by addition of Ca(OH)2. Permanent hardness can be removed by the addition of washing soda commonly known as sodium carbonate.