Hydrogen And Its Compounds Question 246
Question: Permanent hardness in water cannot be cured by:
Options:
A) Treatment with washing soda
B) Boiling
C) Calgon’s method
D) Ion exchange method
Show Answer
Answer:
Correct Answer: B
Solution:
[b] Only temporary hardness which is due to $ HCO_3^{-} $ (bicarbonate) ions is removed by boiling.