A) \[FeS{{O}_{4}}.7{{H}_{2}}O\]
B) \[ZnS{{O}_{4}}.7{{H}_{2}}O\]
C) \[CuS{{O}_{4}}.5{{H}_{2}}O\]
D) \[CaS{{O}_{4}}.\frac{1}{2}{{H}_{2}}O\]
E) \[MgS{{O}_{4}}.7{{H}_{2}}O\]
Correct Answer: A
Solution :
\[FeS{{O}_{4}}.7{{H}_{2}}O\]is called green vitriol.
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