GKFix MCQ Question

Which species acts as an oxidizing agent in acidic KMnO₄ solution?

• A. MnO4– + 8H+ + 5e– → Mn2+ + 4H2O 1.51
• B. Cr2O72– + 14H+ + 6e– → 2Cr3+ + 7H2O 1.33
• C. NO3– + 4H+ + 3e– → NO(g) + 2H2O 0.97
• D. O2(g) + 4H+ + 4e– → 2H2O 1.23