RRB Technician 2014 Ques 44
Question: Permanent hardness of water is due to the presence of
Options:
A) calcium bicarbonate
B) sulphates and chlorides of calcium and magnesium
C) sulphates and chlorides of sodium and potassium
D) nitrates of sodium and potassium
Show Answer
Answer:
Correct Answer: B
Solution:
- Permanent hardness of water is due to the presence of sulphates and chlorides of calcium and magnesium.
BETA
