Plaster of paris is
CaSO4 . H2O
CaSO4 .2H2O
2CaSO4 . H2O
CaSO4 . 3H2O
Plaster of paris is 2CaSO4.H2O.
Plaster of Paris is prepared by heating one of the following to a temperature of 100o C. This is :
(a) CaSO32H2O
(b) CaCl22H2O
(c) CaCO3.2H2O
(d) CaSO4.2H2O
CaSO4.2H2O Δ120∘C−−−−−−→ A–– + 3H2O.A is