What is the difference between Gypsum and Plaster of Paris ?

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Solution

SOLUTION
Gypsum Plaster of Paris
Chemical formula is ${CaSO}_{4} . 2 H_{2} O$ Chemical formula is ${CaSO}_{4} . \frac{1}{2} H_{2} O$
It is known as calcium sulphate dihydrate It is known as calcium sulphate hemihydrate
It is highly durable. It is comparatively less durable.
It is used in fertilizers, paper and textiles, and the cement industry. It is also used in medicine to make plaster.

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Gypsum	Plaster of Paris
Chemical formula is ${CaSO}_{4} . 2 H_{2} O$	Chemical formula is ${CaSO}_{4} . \frac{1}{2} H_{2} O$
It is known as calcium sulphate dihydrate	It is known as calcium sulphate hemihydrate
It is highly durable.	It is comparatively less durable.
It is used in fertilizers, paper and textiles, and the cement industry.	It is also used in medicine to make plaster.