GKFix MCQ Question

Which of the following has E⁰ = –2.87 V?

• A. K+ + e– → K(s) –2.93
• B. Na+ + e– → Na(s) –2.71
• C. Ca2+ + 2e– → Ca(s)
• D. Mg2+ + 2e– → Mg(s) –2.36