Temporary hardness of water is caused by the presence of which of the following?

Correct answer: Bicarbonates of Calcium and Magnesium

Explanation: ✅ Correct Answer: (B) Bicarbonates of Calcium and Magnesium 📚 Explanation: Temporary hardness in water is primarily due to the dissolved bicarbonate minerals, specifically calcium bicarbonate and magnesium bicarbonate. This type of hardness is called "temporary" because it can be easily removed by boiling the water. When water is boiled, the soluble bicarbonates decompose into insoluble carbonates, which precipitate out as scale. In contrast, permanent hardness is caused by chlorides and sulphates, which require chemical treatment for removal.