In the redox reaction: 3H₂S + 2HNO₃ → 3S + 2NO + 4H₂O, which element is being oxidized?

Nitrogen
Oxygen
Sulfur
Hydrogen

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The oxidation state of Sulfur in H₂S is -2 and it increases to 0 in elemental Sulfur. Since the oxidation state increases (loss of electrons), Sulfur is oxidized.

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