The oxidation number of sulphur is -1 in
The oxidation number of sulphur is -1 in
A. FeS
B. `FeS_2`
C. `NaO-undersetunderset(ONa)(||)oversetoverset(O)(||)S=O`
D. `undersetunderset(ONa)(|)oversetoverset(O)(||)S-oversetoverset(O)(||)S-ONa`
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Correct Answer - B
In `FeS_2` oxidation state of S= -1
O.S. of Fe = +2 (it is either +3)
Let O.S. of S=x
`therefore` 2 + 2x=0
x= -1
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