Which of the following salt does not contain water of crystallisation
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Answer:
Other three contain water of crystallization blue vitriol (CuSO4 . 5H20), washing soda (Na2CO3 . 1OH2O) and gypsum (CaSO4 2H20).
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Answer:
Baking soda
Explanation:
Baking soda is sodium bicarbonate in anhydrous form without any water of crystallisation and it is widely used as dry fire extinguisher because of its alkali nature.
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