In which of the following reactions, there is no change in valency?

Chemistry · JEE Main · NTA Exams — Redox Reactions and Electrochemistry

1. 4KClO₃ 3KClO₄ + KCl
2. SO₂ + 2H₂S 2H₂O + 3S
3. BaO₂ + H₂SO₄ BaSO₄ + H₂O₂
4. 2BaO + O₂ \(\mathrm{BaO}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{BaSO}_{4}+\mathrm{H}_{2} \mathrm{O}_{2}\)2BaO₂

Answer

(C) BaO 2 + H 2 SO 4 BaSO 4 + H 2 O 2

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