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.