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प्रश्न
Taking sodium carbonate as an example, give the meaning of the following terms:
Anhydrous
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उत्तर
Hydrous salt on heating lose their water of crystallization, such salts are then called anhydrous.
For example: Na2CO3.10H2O on losing 10 molecules of water forms Na2CO3.
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संबंधित प्रश्न
Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid
What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved.
What is meant by 'a family of salts'? Explain with examples.
The number of molecules of water of crystallisation present in washing soda crystals is:
(a) five
(b) two
(c) ten
(d) seven
P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:
(a) blue litmus red?
How many molecules of water of crystallisation (per formula unit) are present in:
copper sulphate crystals?
What is a ‘salt’?
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?
State what would you observe when :
Washing soda crystals are exposed to the atmosphere.
Distinguish by a chemical test sodium carbonate and sodium sulphite.
