A) \[{{H}_{2}}S\]
B) \[Fe{{S}_{2}}\]
C) \[C{{S}_{2}}\]
D) \[C{{u}_{2}}S\]
Correct Answer: A
Solution :
Let the oxidation number of S in \[Fe{{S}_{2}}\]is \[x.\] \[2+2.\,x=0\] \[2x=-2\] \[x=-1\]
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