Question

1986
Why is anhydrous CaCl, used in a desiccator. Name one substance which is 'efflorescent"
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Name a salt a) which contains water of crystallization, b] which does not contain.​

Answer 1

Answer:

Ques:- Why is anhydrous CaCl, used in a desiccator. Name one substance which is 'efflorescent"

Ans:- Anhydrous Calcium chloride (CaCl₂) has a capacity of absorbing moisture as it is hygroscopic in nature, so it is used as a desiccators. An efflorescent substance is a chemical which has water associated with its molecules, and which, when exposed to air, loses this water through evaporation.

Ques:- :Name a salt:-

Name a salt:- (a) which contains water of crystallization:- Salts that contain water molecules are known as hydrated salts. For example: copper sulphate, gyspsum, sodium carbonate, etc.

(b) which does not contain:- Sodium Nitrate, Potassium Chloride, Potassium Nitrate, Barium Sulphate are the salts which does not contain water of crystallization.

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