Question

Which of the following is/are the method(s) to soften hard water?

• A. Boiling
• B. Ion exchange process
• C. Cooling
• D. Addition of washing soda

Answer 1

Answer: (A), (B), (D)

The correct options are
A Boiling
B Ion exchange process
D Addition of washing soda

Hard water is unfit for drinking, laundry and household uses. So, it has to be softened. Following are the methods to soften hard water:

• addition of washing soda followed by filteration of insoluble product
• boiling of hard water followed by the filteration of insoluble product
• Ion exchange process in which hard water is passed through a zeolite mixture.