Question

Why is CaSO4 called plaster of Paris

Answer 1

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Answer 2

Because Plaster of Paris(POP) is obtained by heating Calcium Sulphate hemi Hydrate also referred as gypsum for about 140-180 degree Celsius. The name plaster of paris is derived as calcium sulphate hemi hydrate are found in large amount deposited in Montmartre hills in paris..