Question

8. Hardness of water can be removed by
a. Boiling
b. Ion-exchange
c. Adding washing soda
d. All the above​

Answer 1

Answer:

Ion exchange

Explanation:

The permanent hardness cannot be removed by boiling. -The permanent hardness of the water can be removed by Gan's Permutit method, Ion exchange resin method, and washing soda method. -Thus, the permanent hardness of water cannot be removed by boiling water.

Answer 2

Answer:

d.all of the above.

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