What is the change in the oxidation number of phosphorus in the the reaction represented by the following equation? 4P (s) + 5O2 (g) → 2P2O5(g)

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A. 0 to + 2
B. 0 to 5
C. +4 to + 2
D. +4 to +5
E. +4 to +7

Correct Answer:

Option B = 0 to 5

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