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Plaster of Paris is harden by...

Plaster of Paris is harden by

A

giving off `CO_2`

B

changing into `CaCO_3`

C

uniting with water

D

giving out water

Text Solution

Verified by Experts

The correct Answer is:
C
`underset("Plaster of Paris")(CaSO_4 * (1)/(2) H_2O ) + (3)/(2) H_2O to underst("Gypsum (hard)")(CaSO_4 * 2H_2O)`
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