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प्रश्न
The chemical formula of plaster of Paris is ______.
रिकाम्या जागा भरा
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उत्तर
The chemical formula of plaster of Paris is CaSO4.1/2H2O.
Explanation:
Plaster of Paris is obtained by heating gypsum (CaSO4 . 2H2O) carefully to a specific temperature of 373 K. At this temperature, the gypsum loses three-fourths of its water of crystallisation to form a white powder. When mixed back with water, it rehydrates and sets quickly into a hard, solid mass of gypsum.
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