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प्रश्न
What do you understand by
Hard water
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उत्तर
Water is said to be hard when it does not readily form lather with soap.
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संबंधित प्रश्न
Give two examples of hydrated substances.
Define the Soft water.
What do you understand by
Soft water
Give reason for the following:
Hardness in temporary water can be removed by boiling, but hardness in permanent hard water cannot.
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you distinguish between hard and soft water?
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you prove the advantage of detergent over soap.
Fill in the blank:
Hard and soft water can be distinguished using _____.
State the causes of hardness in water.
Give two natural sources of hard water.
Two samples of water are placed in a beaker individually. State how you will determine experimentally which of the two samples contains permanent hard water.
