Question

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

Answer 1

Answer:

Plaster of Paris is prepared by heating gypsum to 393 K <br>

<br> If the temperature is raised above 393 K , plaster of paris is further dehydrated to form anhydrous calcium sulphate which is also called dead burnt plaster since it loses the properties of setting with water <br>