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प्रश्न
What are the advantages of hard water.
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उत्तर
Advantages of hard water:
Water free from dissolved salts has a very flat taste. The presence of salts in hard water makes it tasty. So, hard water is used in making beverages and wines.
Calcium and magnesium salts present in small amounts in hard water are essential for bone and teeth development.
Hard water checks the poisoning of water by lead pipes. When these pipes are used for carrying water, some lead salts dissolve in water to make it poisonous. Calcium sulphate present in hard water forms insoluble lead sulphate in the form of a layer inside the lead pipe and this checks lead poisoning.
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संबंधित प्रश्न
Give reason for It is difficult to cook in hills compared to plain.
Give two examples for Efflorescent substance.
What do you observe when Washing soda is exposed to air ?
Define the Hard water.
Give balanced equation to show how temporary hardness enters into water.
Give balanced equation to show how temporary hardness in water can be removed by boiling.
Give balanced equations to show how permanent hardness in water can be removed by addition of washing soda.
Give reason for the following:
Hardness in temporary water can be removed by boiling, but hardness in permanent hard water cannot.
Explain the meaning of the terms – hard water & soft water.
What is permanent hardness of water? How can it be removed?
