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प्रश्न
Give two examples for Efflorescent substance.
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उत्तर
Washing soda and glauber’s salt (Na2SO4.10 H2O)
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संबंधित प्रश्न
Give two examples of hydrated substances.
Name the compound responsible for permanent hardness of water.
Name three water borne diseases.
What do you understand by
Hard water
What are the advantages of soft water.
Give balanced equation to show how temporary hardness enters into water.
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.
A sample of water is given in a trough. State how would you prove experimentally whether the given sample is hard water or soft 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.
