GKFix MCQ Question

What is the primary reason Cr2+ (d4) is a better reducing agent than Mn2+ (d5)?

• A. Cr2+ has a higher charge.
• B. Mn2+ is more stable than Cr2+.
• C. Cr2+ has a lower atomic number.
• D. Cr2+ achieves greater stability by losing an electron to reach the d3 configuration with a half-filled t2g level, compared to Mn2+ which is already stable.