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Q.

The oxidation state (O.S.) of S-atom is -1 in:

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a

FeS

b

FeS2

c

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d

 

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answer is `.

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Detailed Solution

Oxidation state of S in FeS is:

Oxidation state of Fe+Oxidation state of S=02+Oxidation state of S=0Oxidation state of S=-2

Oxidation state of S in FeS2 is:

Oxidation state of Fe+2(Oxidation state of S)=02+2(Oxidation state of S)=0Oxidation state of S=-1

Oxidation state of S in Na2SO4 is:

2(Oxidation state of Na)+Oxidation state of S+4(Oxidation state of O)=02(1)+Oxidation state of S+4(-2)=0Oxidation state of S=+6

Oxidation state of S in Na2S2O4 is:

2oxidation state of Na+2(oxidation state of S)+4(oxidation state of O)=02(1)+2oxidation state of S+4(-2)=0oxidation state of S=+3

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