Which of the following is NOT a redox reaction? — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

In $BaO_2 + H_2SO_4 \rightarrow BaSO_4 + H_2O_2$, Barium remains +2 and Oxygen remains -1 (peroxide linkage in both $BaO_2$ and $H_2O_2$). Since no element changes its oxidation state, it is not a redox reaction.