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What is the change in the oxidation number of phosphorus in the following ...

What is the change in the oxidation number of phosphorus in the following reaction?

4P(s) + 5O2(ag) → 2P2O5(s)
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  • A 0 to 2
  • B 0 to 5
  • C 4 to 2
  • D 4 to 5
  • E 4 to 10
Correct Answer: Option B
Explanation:

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