What is the chemical formula of Plaster of Paris?
A. CaSO\(_4\)·2H\(_2\)O
B. CaCO\(_3\)
C. CaO
D. CaSO\(_4\)·½H\(_2\)O
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Answer: D. CaSO\(_4\)·½H\(_2\)O
Answer: (D) CaSO\(_4\)·½H\(_2\)O
Plaster of Paris is calcium sulphate hemihydrate, CaSO\(_4\)·½H\(_2\)O, made by heating gypsum (CaSO\(_4\)·2H\(_2\)O) to about 373 K. CaCO\(_3\) is limestone and CaO is quicklime.
Doubtly AI
· 27 Oct 2026
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