GKFix MCQ Question

What is the reduction half-reaction for Cr₂O₇²⁻ in acidic solution?

• A. Cr₂O₇²⁻ + 14H⁺ → 2Cr³⁺ + 7H₂O
• B. Cr₂O₇²⁻ + 6e⁻ → 2Cr³⁺ + 7H₂O
• C. Cr₂O₇²⁻ + 14H⁺ + 6e⁻ → 2Cr³⁺ + 7H₂O
• D. Cr₂O₇²⁻ + 7H₂O → 2Cr³⁺ + 14H⁺ + 6e⁻