Which of the following reactions will occur at the anode in an electrochemical cell?
2Ag+ (aq) + 2e ‾→ 2Ag (s)
Cu^2+ (aq) + 2e ‾→ Cu (s)
Cu^2+ (aq) + Zn (s) ‾→ Zn^2+ (aq) + Cu (s)
Cd (s) ‾→ Cd^2+ (aq) + 2e ‾
2Ag+ (aq) + 2e ‾→ 2Ag (s)
Cu^2+ (aq) + 2e ‾→ Cu (s)
Cu^2+ (aq) + Zn (s) ‾→ Zn^2+ (aq) + Cu (s)
Cd (s) ‾→ Cd^2+ (aq) + 2e ‾
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Cd (s) ‾→ Cd^2+ (aq) + 2e