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On the basis of oxidation number consideration which of the following does not react with molecular oxygen no ,n2o,so2,so3,p4o6

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N oxidation number in N₂O = 1
S oxidation number in SO₂ = 4
S oxidation number in SO₃ = 6
P oxidation number in P₄O₆ = 3
Therefore, the Sulfur in SO₃ will not react with molecular oxygen as Sulfur is already using all of its valence electrons in bonding.
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