Which of the following is an oxidation-reduction reaction? A) HBr(aq) + NaOH(aq) → NaBr(aq) + H₂O(l) B) NaI(aq) + AgNO₃(aq) → AgI(s) + NaNO₃(aq) C) Pb(C₂H₃O₂)₂(aq) + 2 LiBr(aq) → PbBr₂(s) + 2 LiC₂H₃O₂(aq) D) Ba(s) + 2 HCl(aq) → BaCl₂(aq) + H₂(g) E) All of the above are oxidation-reduction reactions.

Question

Quizplus · Accepted Answer

In choice D, Ba(s) is oxidized to Ba^2+ and H^+ is reduced to H2(g), indicating an exchange of electrons, which is characteristic of an oxidation-reduction reaction. Choices A, B, and C involve ionic compounds reacting in solution without any change in oxidation state of the elements involved, thus not fitting the criteria for oxidation-reduction reactions.

Which of the Following Is an Oxidation-Reduction Reaction