[" 179.The method used to remove temporary "],[" hardness of water is: "],[" (1) Ion-exchange method "],[" (2) Synthetic resins method "],[" (3) Calgon's method "],[" (4) Clark's method "]

State two methods to remove temporary hardness.

Explain the methods used for the removal of temporary hardness of water.

Describe one method for removal of temporary hardness of water.

Which method cannot be used to remove hardness of water ?

State one method to remove permanent hardness of water.

Total number of methods which can remove permanent hardness of water: (a) Clark's method , (b) Ion-exchange method (c) synthetic resin method (d) Calgon method (e) treatment with sodium carbonate

In Clark's method the chemical used to remove hardness of water is