Social & Preventive Medicine General 3011674e Temporary hardness of water is primarily due to the presence of A Calcium and magnesium sulphates B Calcium and magnesium chlorides C Calcium and magnesium bicarbonates D Calcium and magnesium nitrates High-Yield Explanation Temporary hardness (Carbonate hardness) due to Calcium & Magnesium salts of Bicarbonates.