Question

what is called plaster of Paris​

Answer 1

Plaster of Paris is obtained by heating gypsum or calcium sulphate dihydrate to about 140-180 degree Celsius. When heated to such a temperature, gypsum forms Plaster of Paris. The name is derived from the large deposits of gypsum in the Montmartre hill in Paris.

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Answer 2

hey dude !!!

$\\ \\ \\ \\ CaSO4. \frac{1}{2} H2O$

hope this helps you