Sulfur dioxide is an atmospheric pollutant that causes acid rain. One of the reactions in this process is the oxidation of sulfur dioxide to sulfur trioxide. This oxidation takes place by a two stage reaction involving oxygen and nitrogen monoxide, NO. NO + ½ O₂ → NO₂ NO₂ + SO₂ → SO₃ + NO Which statements are correct? 1 Nitrogen monoxide is acting as a catalyst for the oxidation. 2 Nitrogen atoms are oxidised in the second stage. 3 Oxygen atoms are first reduced and are then oxidised.
✓ Correct answer
D: 1 only is correct
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