Q. Plaster of Paris is represented by

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A

$CaSO_{4}.2H_{2}O$

B

$CaSO_{4}.3H_{2}O$

C

$CaSO_{4}.H_{2}O$

D

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

Solution:

Plaster of paris is calcium sulfate hemihydrate, it is quicksetting gypsum.
$CaSO_{4}.\frac{1}{2}H_{2}O$ or $\left(\right.CaSO_{4}\left(\left.\right)_{2}.H_{2}O$

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