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  • When gypsum is heated to , it forms:Option: 1 <img alt="CaSO_

When gypsum is heated to 393\; K, it forms:

Option: 1

CaSO_{4}.\frac{1}{2}\: H_{2}O


Option: 2

Dead burnt plaster


Option: 3

CaSO_{4}.5\: H_{2}O


Option: 4

Anhydrous CaSO_{4}


Answers (1)

best_answer

The reaction occurs as follows:

\mathrm{CaSO_{4}.2H_{2}O\: \overset{393K}{\longrightarrow}\: CaSO_{4}.\frac{1}{2}H_{2}O\: +\: \frac{3}{2}H_{2}O}
      Gypsum                     Plaster of Paris

Therefore, Option(1) is correct.

Posted by

jitender.kumar

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