Question

Match List $$I$$ with List $$II$$

Answer 1

Correct option is A. 0,1,4,10,11,13

Hard water, water that contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Water hardness that is caused by calcium bicarbonate is known as temporary because boiling converts the bicarbonate to the insoluble carbonate; hardness from the other salts is called permanent.

Magnesium and calcium salts are used for the removal of hardness of the water.

Temporary hardness is due to Calcium salt like $$Ca(HCO_3)_2$$

Permanent Hardness is due to Magnesium salt like $$MgSO_4$$

Sodium-ion in zeolite gets exchanged with Calcium and magnesium ion in the removal of hardness of the water.

$$\mathbf{A-1,2;\ B-1;\ C-3,4;\ D-2}$$