Plaster of paris is prepared from

(a) What is plaster of Paris? Write the chemical formula of plaster of Paris.

(b) How is plaster of Paris prepared? Write the chemical equation of the reaction involved.

(c) Explain why plaster of Paris should be stored in a moisture-proof container.

(d) State two important uses of plaster of Paris.

Plaster of Paris is prepared by heating which of the following compounds?

Plaster of Paris is prepared by heating one of the following to a temperature of ${100}^{o}C$. This is :

(a) $CaS{O}_{3}2H_{2}O$

(b) $CaC{l}_{2}2H_{2}O$

(c) $CaC{O}_3.2H_{2}O$

(d) $CaS{O}_4.2H_{2}O$