Question

Q13 Which of the following is used
for removing permanent hardness
from water?
O Baking soda
O Washing soda
O Bleaching powder
O Sodium chloride​

Answer 1

Answer:

Washing soda

Explanation:

We can remove this hardness by treating the water with washing soda. Insoluble carbonates are formed when washing soda reacts with the sulfide and chloride salts of magnesium and calcium and thus hard water is converted to soft water