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Question
Chemistry
The difference of water molecules in gypsum and plaster of Paris is
Q. The difference of water molecules in gypsum and plaster of Paris is
1745
193
Jharkhand CECE
Jharkhand CECE 2015
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A
2
5
B
2
C
2
1
D
1
2
1
Solution:
Formula of gypsum
=
C
a
S
O
4
.2
H
2
O
Formula of plaster of Paris
=
C
a
S
O
4
.
2
1
H
2
O
Thus, difference of water molecule
=
2
H
2
O
−
2
1
H
2
O
=
1
2
1
H
2
O