Q. What is the chemical name of plaster of paris?
Answer: Calcium sulphate
Notes: Plaster of Paris is one hydrate of Calcium sulphate, and is represented by chemical formula CaSO4·1/2H2O or 2CaSO4·H2O and is thus also chemically known as Calcium Sulphate Hemihydrate. It is used as a support for setting the broken bones and as a decorative element in construction.

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