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प्रश्न
Write any five uses of salts.
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
What are the two main ways in which common salt (sodium chloride) occurs in nature?
Why is sodium chloride required in our body?
What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.
The number of molecules of water of crystallisation present in washing soda crystals is:
(a) five
(b) two
(c) ten
(d) seven
name two salts which are neutral, when dissolved in water.
The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
Which solution will have no effect on litmus solution?
The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
Which solution will liberate CO2 when reacted with sodium carbonate?
State what would you observe when :
Washing soda crystals are exposed to the atmosphere.
Identify the following substance:
Gas C has an offensive smell like rotten eggs.
An aqueous solution of a salt turns blue litmus to red. The salt could be the one obtained by the reaction of ______.
