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प्रश्न
State one relevant observation for the following:
Anhydrous calcium chloride is exposed to air for some time.
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उत्तर
Anhydrous CaCl2 on exposure to atmosphere form solution.
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संबंधित प्रश्न
Name three chemicals made from common salt (or sodium chloride).
How would you show that blue copper sulphate crystals contain water of crystallisation?
The aqueous solution of one of the following salts will turn red litmus to blue. This salt is:
The salt whose aqueous solution will have no effect on either red litmus or blue litmus is ______.
Write the name and formula of one salt which contains:
Five molecules of water of crystallisation
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?
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Salt is ______ in nature.
What are hygroscopic substances?
You are provided with the list of chemicals mentioned below in the box:
| Sodium hydroxide solution, copper carbonate, zinc, hydrochloric acid, copper, dilute sulphuric acid, chlorine, iron |
Using suitable chemicals from the list given, write a balanced chemical equation for the preparation of the salt mentioned below:
Copper sulphate
