A) \[Fe{{S}_{2}}+{{H}_{2}}O+{{O}_{2}}\]
B) \[Fe{{S}_{2}}+{{H}_{2}}O+C{{O}_{2}}\]
C) \[Fe{{S}_{2}}+CO+C{{O}_{2}}\]
D) \[Fe{{S}_{2}}+CO\]
Correct Answer: A
Solution :
Key Idea: Green vitriol is formed by oxidation of iron pyrite in presence of air and water \[\underset{\text{pyrites}}{\mathop{2Fe{{S}_{2}}}}\,+2{{H}_{2}}O+7{{O}_{2}}\xrightarrow{{}}\underset{\text{green}\,\text{vitriol}}{\mathop{2FeS{{O}_{4}}}}\,+2{{H}_{2}}S{{O}_{4}}\]
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