In which reaction does the oxidation number of oxygen increase? A) 2 SO₂(g) + O₂(g) -2 SO₃(g) B) HCl (aq) + NaOH (aq) -NaCl (aq) + H₂O (l) C) Ba(NO₃)₂(aq) + K₂SO₄(aq) -BaSO₄(s) + 2 KNO₃(aq) D) 2 H₂O (l) -2 H₂(g) + O₂(g) E) MgO (s) + H₂O (l) -Mg(OH)₂(s)

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Quizplus · Accepted Answer

In reaction D, the oxidation number of oxygen goes from 0 to -2. Therefore, it is an example of oxidation.

In Which Reaction Does the Oxidation Number of Oxygen Increase