GKFix MCQ Question

Why is the E°(Fe3+/Fe2+) value positive, indicating Fe3+ is an oxidising agent?

• A. Fe2+ is larger than Fe3+
• B. Fe3+ is more hydrated than Fe2+
• C. Fe2+ (d6) is relatively stable, making its oxidation to Fe3+ (d5) favorable
• D. Fe3+ (d5) is relatively stable, making its reduction to Fe2+ (d6) favorable