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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
Name the salt which is used as preservative in pickles, and in curing meat and fish.
A salt whose aqueous solution will have a pH of more than 7 will be:
(a) K2CO3
(b) K2SO4
(c) NaCl
(d) NH4Cl
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:
(a) CH3COONa
(b) Na2CO3
(c) KCl
(d) NH4Cl
Which of the following salts will give an aqueous solution having pH of almost 7?
(a) NH4NO3
(b) NH4Cl
(c) CaCl2
(d) KCl
How many molecules of water of crystallisation (per formula unit) are present in:
copper sulphate crystals?
Define the following term:
Water of crystallization
Differentiate hydrate and anhydrous salts with examples.
Acids react with metallic oxides to produce ______.
Name the salt formed when sulphuric acid is added to sodium hydroxide and write its pH.
An aqueous solution of a salt turns blue litmus to red. The salt could be the one obtained by the reaction of ______.
