Social & Preventive Medicine 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 💡 Explanation Temporary hardness of water is primarily due to the presence of: ✓ Correct Answer: C. Calcium and magnesium bicarbonates