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Identify the correct statement....

Identify the correct statement.

A

Gypsum is obtained by heating plaster of paris

B

Plaster of paris can be obtained by hydration of gypsum

C

Plaster of paris is obtained by hydration of gypsum

D

Gypsum contains a lower percentage of calcium than plaster of paris

Text Solution

Verified by Experts

The correct Answer is:
4
The formula of gysum is `CaSO_(4).2H_(2)O` and that of plaster of paris is `(CaSO_(4))_(2).2H_(2)O`,so the percentage of Ca in plaster of paris is more than gypsum.
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