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Oxidation states of P in H4P2O5, H4P2O6, and H4P2O7 are, respectively:

1. +3, +5, +4
2. +5, +3, +4
3. +5, +4, +3
4. +3, +4, +5

Correct answer: +3, +4, +5

Solution

To determine the oxidation state of P in each compound, use the oxidation state rules. For H4P2O5, P is +3; for H4P2O6, P is +4; and for H4P2O7, P is +5. This matches option D.

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