GKFix MCQ Question

Why is Cr2+ considered a reducing agent despite having a d4 electron configuration?

• A. Because it readily gains electrons to achieve a d6 configuration.
• B. Because the d4 configuration is inherently unstable.
• C. Because its configuration changes to the more stable d5 configuration upon losing an electron.
• D. Because its configuration changes to the more stable d3 configuration with a half-filled t2g level upon losing an electron.