Question

Dead burnt plaster is.

• A. $CaSO_{4}$
• B. $CaSO_{4}.\frac{1}{2}H_{2}O$
• C. $CaSO_{4}.H_{2}O$
• D. $CaSO_{4}.2H_{2}O$

Answer 1

Answer: (A)

$CaSO_{4}$

Answer 2

: Anhydrous calcium sulphate, $CaSO_{4}$ is known as dead burnt plaster’ it is formed by heating gypsum, $CaSO_{4}.2H_{2}O$ at above 393 K.