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What is the sequence of oxidation states of phosphorus in the compounds H₃PO₂, H₃PO₃, H₃PO₄, and H₄P₂O₆?

1. H₃PO₄ > H₃PO₃ > H₃PO₂ > H₄P₂O₆
2. H₃PO₄ > H₃PO₂ > H₃PO₃ > H₄P₂O₆
3. H₃PO₂ > H₃PO₃ > H₄P₂O₆ > H₃PO₄
4. H₃PO₄ > H₄P₂O₆ > H₃PO₃ > H₃PO₂

Correct answer: H₃PO₄ > H₄P₂O₆ > H₃PO₃ > H₃PO₂

Solution

The sequence of oxidation states of phosphorus in the given compounds can be determined by calculating the oxidation state of phosphorus in each compound, considering the oxidation states of hydrogen and oxygen, and then arranging them in order of decreasing oxidation state.

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