A) 1/2 and 2
B) 2 and ½
C) 2 and 1
D) 5 and 2
Correct Answer: B
Solution :
Molecular formula of gypsum and plaster of Paris is\[CaS{{O}_{4}}2{{H}_{2}}O\] and\[CaS{{O}_{4}}.\frac{1}{2}{{H}_{2}}O\]. Therefore, number of water molecules in gypsum and plaster of Paris is \[2\] and\[\frac{1}{2}\]respectively.
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