Formula of Plaster of Paris is
Options
(a) CaSO₂.(1/2)H₂O
(b) CaSO₄.H₂O
(c) CaSO₄.(1/3)H₂O
(d) CaSO₄.2H₂O
Correct Answer:
CaSO₂.(1/2)H₂O
Explanation:
Plaster of Paris is CaSO₄. 1/2 H₂O. It is formed by heating the gypsum. CaSO₄. 2H₂O → CaSO₄ . 1/2 H₂O.