Question

Assertion (A): In the preparation of Plaster of Paris from Gypsum, the temperature
maintained is 1000C.
Reason (R): The temperature is maintained at 1000C to prevent the formation of
dead burnt plaster.

Answer 1

Answer:

First of all Assertion is wrong bcoz prepartion of POP TO GPYSUM require only 393k temperature

And second is reason is also wrong the reason is

when you increase the temperature above 393k it dehydrated to anhydrous calcium suphate which is also called dead burnt plaster ..

Thank You !!!