1. What is the oxidatin number of Phosphorous in PCl3? : What is the oxidation number ofo Phosphorous in PCl3? 2. What is the oxidation number of Phosphorous in H4P2O7? : What is the oxidation number of Phosphorous in H4P2O7? 3. What is the oxidation number of Phosphorous in H4P2O6? : What is the oxidation number of Phosphorus in H4P2O6? Column B a.The oxidation number is +1. b.The oxidation number is +4. c.The oxidation number is +3. d.The oxidation number is +5. e.The oxidation number is +2

1. The oxidation number of Phosphorus in PCl3 is +3.

2. The oxidation number of Phosphorus in H4P2O7 is +5.
3. The oxidation number of Phosphorus in H4P2O6 is +5.