Consider the acidic redox reaction

CHEMISTRY · Single correct · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions

Problem

Consider the acidic redox reaction MnO4−+5 C2O42−+16 H+→2 Mn2++10 CO2+8 H2O\text{MnO}_4^-+5\,\text{C}_2\text{O}_4^{2-}+16\,\text{H}^+\rightarrow 2\,\text{Mn}^{2+}+10\,\text{CO}_2+8\,\text{H}_2\text{O}. Which pair correctly identifies (i) the element that undergoes oxidation and (ii) the substance that functions as the oxidizing agent? (a) carbon ; C2O42−\text{C}_2\text{O}_4^{2-} (b) manganese ; MnO4−\text{MnO}_4^- (c) carbon ; MnO4−\text{MnO}_4^- (d) carbon ; H+\text{H}^+

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