Q

The chemical name for 'Plaster of Paris' is:

JE CBT-1, 18-Dec-24 S-3 2024
✓ Answer: C calcium sulphate hemihydrate
Plaster of Paris is chemically known as calcium sulphate hemihydrate: CaSO4·(1/2)H2O. It is produced by heating gypsum (calcium sulphate dihydrate) to about 150°C. When mixed with water, it rehydrates and forms a hard solid, making it useful for medical casts, sculptures, and construction. It is widely used for making casts and setting properties and ease of use.
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