Question

What is the chemical name of Plaster of Paris?

• A. Calcium sulphate
• B. Calcium sulphate monohydrate
• C. Calcium sulphate hemihydrate
• D. Calcium chloride \bigskip

Hint:

Plaster of Paris is widely used in construction, medical casts, and sculptures due to its quick-setting properties.

Answer 1

The Correct Option is C

Plaster of Paris (POP) is chemically calcium sulphate hemihydrate (CaSO$_4$·$\frac{1}{2}$H$_2$O). It is obtained by heating gypsum (CaSO$_4$·2H$_2$O) to remove water.