Formula of Plaster of Paris is -
2022
Formula of Plaster of Paris is -
- A.
CaSO₄·½H₂O
- B.
CaSO₄·¼H₂O
- C.
CaSO₄·⅓H₂O
- D.
CaSO₄·2H₂O
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Correct answer: A
Plaster of Paris (POP) is chemically known as Calcium Sulphate Hemihydrate. Its chemical formula is: CaSO₄·1/2H₂O
It is prepared by heating Gypsum (CaSO₄·2H₂O) to about 373 K. When water is added to Plaster of Paris, it sets into a hard mass of gypsum.
Therefore, the correct answer is CaSO₄·½H₂O.