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Question

The oxidation state of S-atom is1 in :

A
FeS
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B
FeS2
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C
NaOO||S||OONa
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D
NaOO||SO||SONa
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Solution

The correct option is B FeS2
(a)FeS oxidation state of S = +2

(b)In FeS2 iron is in +2 state. FeS2 contains the S22 ion, which is analogous to the peroxide ion, O22. The oxidation state of sulphur is -1 in FeS2, just as oxygen is in peroxides like H2O2 andBaO2.

(c)oxidation state of S = +6

(d)oxidation state of S = +3

Hence,option B is correct.

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