Consider the Following Reduction Potentials

Multiple Choice

Consider the following reduction potentials:
Cd²⁺(aq) + 2e^- Cd(s) ; E° = -0.40 V
Pb²⁺(aq) + 2e^- Pb(s) ; E° = -0.13 V
Cu²⁺(aq) + 2e^- Cu(s) ; E° = 0.34 V
Br₂(l) + 2e^- 2Br^-(aq) ; E° = 1.07 V
Under standard-state conditions,which of the following reactions is spontaneous?

A) Cd²⁺(aq) + Pb(s) → Cd(s) + Pb²⁺(aq)
B) Pb²⁺(aq) + Cu(s) → Pb(s) + Cu²⁺(aq)
C) 2Br^-(aq) + Pb²⁺(aq) → Br₂(l) + Pb(s)
D) 2Br^-(aq) + Cu²⁺(aq) → Br₂(l) + Cu(s)
E) Cu²⁺(aq) + Cd(s) → Cu(s) + Cd²⁺(aq)