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What is the oxidation state of S in H2 ...

What is the oxidation state of S in `H_2 SO_4`,

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`H_2SO_3:` 2(+1)+x+3 (-2)=0, x=4
Oxidation state of S in `H_2 SO_3`=+4.
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SUBHASH PUBLICATION-REDOX REACTIONS-Two Mark Question
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