A) \[FeS{{O}_{4}}.7\,{{H}_{2}}O\]
B) \[FeS{{O}_{4}}.5\,{{H}_{2}}O\]
C) \[CaS{{O}_{4}}.5\,{{H}_{2}}O\]
D) \[CaS{{O}_{4}}.7\,{{H}_{2}}O\]
Correct Answer: A
Solution :
Ferrous sulphate \[(FeS{{O}_{4}}.7{{H}_{2}}O)\] is called the green vitriol. It is a green crystalline solid.
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