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प्रश्न
Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid
उत्तर
A few drops of the liquid to be tested are added to white anhydrous copper sulphate powder. The appearance of a blue colour in anhydrous copper sulphate indicates the presence of moisture or water in the liquid.
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संबंधित प्रश्न
What are the two main ways in which common salt (sodium chloride) occurs in nature?
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pH less than 7
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You are asked to prepare hard water in your laboratory. Select a group from the following groups of salts, any salt of which you may dissolve in distilled water to obtain hard water.
(A) NaCl; Na2SO4; KCl
(B) NaCl; CaCl2; KCl
(C) CaCl2; CaSO4; MgSO4
(D) Na2SO4; CaSO4; MgSO4
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?
Copy and complete the following table which refers to the action of heat on the carbonate:
| Carbonate | Colour of residue on cooling |
| Zinc Carbonate |
The acid reacts with a base to form a neutral product called ______.
Salt which is formed by the partial replacement of hydrogen ions of an acid by a metal is called ______.
