Which is NOT a disproportionation reaction?*NaHCO3 → Na2CO3 + H2O + CO2HNO2 → HNO3 + NO + H2O2H2O2 (aq) → 2H2O (l) + O2 (g)CuBr → CuBr2 + Cu
Question
Which is NOT a disproportionation reaction?
NaHCO3 → Na2CO3 + H2O + CO2HNO2 → HNO3 + NO + H2OH2O2 (aq) → 2H2O (l) + O2 (g)CuBr → CuBr2 + Cu
Solution
The reaction that is NOT a disproportionation reaction is H2O2 (aq) → 2H2O (l) + O2 (g).
A disproportionation reaction is a redox reaction in which a single element is both oxidized and reduced, resulting in an increase and decrease in its oxidation state. In the given reaction, hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen (O2). Here, the oxygen in H2O2 is reduced to H2O and oxidized to O2. However, no single element undergoes both oxidation and reduction in this reaction, so it is not a disproportionation reaction.
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