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प्रश्न
Common salt is obtained from sea-water by the process of ______.
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उत्तर
Common salt is obtained from sea-water by the process of evaporation.
Explanation:
Seawater is trapped in shallow pans and left exposed to the sun and wind. Over time, the water absorbs heat and turns into water vapour, leaving behind solid salt crystals. This crude salt is then collected and purified for household use.
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संबंधित प्रश्न
From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:
[AgCl, MgCl2, NaHSO4, PbCO3, ZnCO3, KNO3, Ca(NO3)2]
On heating, this salt gives a yellow residue when hot and white when cold
Give one word or a phrase:
The property by which certain hydrated salts, when left exposed to atmosphere, lose their water of crystallization and crumble into powder.
Write a balanced equation for the preparation of the following salts:
Copper sulphate from copper carbonate.
Name the major salt present in sea-water.
How is common salt obtained from sea-water?
Why is sodium chloride required in our body?
Give any two uses of common salt (sodium chloride).
What name is given to the common salt which is mined from underground deposits? How was this salt formed?
Rock salt is mined just like ______.
Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid.
A salt whose aqueous solution will have a pH of more than 7 will be ______.
The pH values of three solutions A, B and C are given in the table. Answer the following questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
- Which solution will have no effect on litmus solution?
- Which solution will liberate CO2 when reacted with sodium carbonate?
- Which solution will turn red litmus solution blue?
Taking sodium carbonate as an example, give the meaning of the following terms:
Water of crystallization
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?
Name gases which has a sour taste.
Sodium carbonate is a basic salt because it is a salt of a ____________.
The chemical name of plaster of Paris is ______.
What are hygroscopic substances?
Select the correct answer from A, B, C, D and E.
A compound which in the aqueous solution state, is neutral in nature.
