Tardigrade
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Tardigrade
Question
Chemistry
Identify the correct statement.
Q. Identify the correct statement.
2770
187
AIPMT
AIPMT 1995
The s-Block Elements
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A
Gypsum is obtained by heating plaster of Paris
18%
B
Plaster of Paris can be obtained by hydration of gypsum
23%
C
Plaster of Paris is obtained by partial oxidation of gypsum
25%
D
Gypsum contains a lower percentage of calcium than plaster of Paris
35%
Solution:
The formula of gypsum is
C
a
S
O
4
⋅
2
H
2
O
and that of plaster of Paris is
(
C
a
S
O
4
)
2
⋅
2
H
2
O
, so the percentage of Ca in plaster of Paris is more than gypsum.