GKFix MCQ Question

Which of the following is involved in water disinfection?

• A. I2(s) + 2e– → 2I– 0.54
• B. Cl2(g) + 2e– → 2Cl– 1.36
• C. Br2 + 2e– → 2Br– 1.09
• D. O2(g) + 2H+ + 2e– → H2O2 0.68