s-Block ElementsHard
Question
Consider the following statements,
S1 : Gypsum contains a lower percentage of calcium than plaster of pairs.
S2 : Plaster of paris can be re-obtained by hydration of ′dead plaster′.
S3 : Gypsum loses of its water of crystallisation forming plaster of paris at 120oC.
S4 : Plaster of paris can be obtained by partial oxidation of gypsum.
and arrange in the order of true/false.
S1 : Gypsum contains a lower percentage of calcium than plaster of pairs.
S2 : Plaster of paris can be re-obtained by hydration of ′dead plaster′.
S3 : Gypsum loses of its water of crystallisation forming plaster of paris at 120oC.
S4 : Plaster of paris can be obtained by partial oxidation of gypsum.
and arrange in the order of true/false.
Options
A.T F T F
B.F F T F
C.T T F F
D.T T T T
Solution
CaSO4. 2 H2O 
2 CaSO4.H2O (Calcium sulphate hemihydrate).
2 CaSO4.H2O (Calcium sulphate hemihydrate).Create a free account to view solution
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