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Q.

Washing Soda can be obtained by heating _______.

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a

Bleaching Powder 

b

Baking Soda 

c

Chlorine gas 

d

Plaster of Paris

answer is A.

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Detailed Solution

  • The chemical formula of washing soda is Na2CO3.10H2O.
  • Washing soda can be achieved by heating the baking soda (sodium bicarbonate). 
  • As a result of heating, sodium bicarbonate produces sodium carbonate, carbon dioxide and water.
  • Consequently, the recrystallization of sodium carbonate gives washing soda. 
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