Question

Temporary hardness of water is due to the presence of

• A. Magnesium bicarbonate
• B. Calcium chloride
• C. Magnesium sulphate
• D. Calcium carbonate

Answer 1

Answer: (A)

Chlorides and sulphates of $Mg$ and $Ca$ produces permanent hardness and bicarbonates of $Mg$ and $Ca$ produces temporary hardness.