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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
Write a balanced equation for the preparation of the following salts:
Copper sulphate from Copper Carbonate.
Complete and balance the following chemical equation:
\[\ce{NaCl + NH3 + H2O + CO2 ->}\]
Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid.
What happens when a few drops of water are added to anhydrous copper sulphate? Explain with the help of an equation.
What is deliquescence? What name is given to the compounds exhibiting such property?
Taking sodium carbonate as an example, give the meaning of the following terms:
Anhydrous
Answer the following questions below, relating your answers only to salts in the following list:
Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water.
(i) What is the name given to the water in the compound copper sulphate-5-water?
(ii) If copper sulphate-5-water is heated, the water is driven off leaving anhydrous copper sulphate. What is the colour of anhydrous copper sulphate?
(iii) By what means, other than heating, you can dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate?
(iv) Which one of the salts in the given list is deliquescent?
Many salts absorb water from the atmosphere. This property is called:
The acid reacts with a base to form a neutral product called ______.
Salt which is formed by the partial replacement of hydrogen ions of an acid by a metal is called ______.
