Question

Consider the following table of standard reduction potentials.

Half-reaction	E o (V)
Cu2+(aq) + 2e? ? Cu(s)	+0.34
Pb2+(aq) + 2e? ? Pb(s)	-0.126
Cd2+(aq) + 2e? ? Cd(s)	-0.403
Zn2+(aq) + 2e? ? Zn(s)	-0.76

Based on these values, which of the following choices represents the correct combination of cell reaction and standard cell potential?

	Cu2+(aq) + Cd(s) ? Cu(s) + Cd2+(aq), +0.06 V
	Cu2+(aq) + Zn(s) ? Cu(s) + Zn2+(aq), ?0.42 V
	Pb2+(aq) + Cd(s) ? Pb(s) + Cd2+(aq), +0.53 V
	Pb2+(aq) + Zn(s) ? Pb(s) + Zn2+(aq), +0.63 V