Give two examples of hydrated substances.

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Removal of Hardness of Water

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अध्याय 8: Water - Exercise II [पृष्ठ ११५]

अध्याय 8 Water
Exercise II | Q 6.1 | पृष्ठ ११५

What is the effect on boiling point of water when pressure is increased?

What do you observe when Washing soda is exposed to air ?

Name the compound responsible for temporary hardness.

Temporary hardness of water can be removed by

What do you understand by

Hard water

Give reason for the following:

Hardness in temporary water can be removed by boiling, but hardness in permanent hard water cannot.

State the causes of hardness in water.

Give two natural sources of hard water.

Permanent hardness of water is due to the presence of _______.

Write a note on ion exchange.