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प्रश्न
Write any five uses of salts.
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उत्तर
Common Salt (NaCl): It is used in our daily food and used as a preservative.
1. Washing Soda (Sodium Carbonate):
- It is used in softening hard water.
- It is used in glass, soap and paper industries.
2. Baking Soda (Sodium bicarbonate -NaHC03):
- It is used in making of baking powder which is a mixture of baking soda and tartaric acid.
- It is used in soda-acid fire extinguishers.
- Baking powder is used to make cakes and bread, soft and spongy.
- It neutralizes excess acid in the stomach and provides relief.
3. Bleaching powder (Calcium Oxychloride – CaOCl2)
- It is used as disinfectant.
- It is used in textile industry for bleaching cotton and linen.
4. Plaster of Paris (Calcium Sulphate Hemihydrate – CaS04 . 1/2H20)
- It is used for plastering bones
- It is used for making casts for statues
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संबंधित प्रश्न
The salt prepared by the method of direct combination is _______.
Name three chemicals made from common salt (or sodium chloride).
The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is:
A salt is dissolved in water and the pH of this salt solution is measured with a universal indicator paper. If the pH of solution is less than 7, the salt is most likely to be ______.
How many molecules of water of crystallisation (per formula unit) are present in:
Copper sulphate crystals
Explain ‘salt hydrolysis’
Taking sodium carbonate as an example, give the meaning of the following terms:
Water of crystallization
State what would you observe when :
Washing soda crystals are exposed to the atmosphere.
Distinguish by a chemical test sodium carbonate and sodium sulphite.
Select the correct answer from A, B, C, D and E.
A compound which in the aqueous solution state, is neutral in nature.
