Which reaction represents an example of a disproportionation (dismutation) redox reaction?
Answer and explanation
Correct answer: C. 2 H2O2(aq) -> 2 H2O(l) + O2(g)
A disproportionation reaction is a specific type of redox reaction in which an element in an intermediate oxidation state is simultaneously oxidized and reduced. In hydrogen peroxide (H2O2), oxygen has an oxidation state of -1. In H2O, oxygen is reduced to -2; in O2, oxygen is oxidized to 0.
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