Water is often treated with chlorine,because it

$D_2O$ is used in

Can you use soaps and synthetic detergents to check the hardness of water?

Which of the following can effectively remove all types of hardness of water?

When the first element of the periodic table is treated with dioxygen,it gives a compound whose solid state floats on its liquid state. This compound has an ability to act as an acid as well as a base. What products will be formed when this compound undergoes autoionisation?

The major products during the removal of temporary hardness of water are