A) \[Zn+C{{u}^{2+}}\,\to \,\,Cu+Z{{n}^{\text{2+}}}\]
B) \[~Zn+2A{{g}^{+}}\to \text{ }2Ag+Z{{n}^{2+}}\]
C) \[{{H}_{2}}+C{{u}^{2+}}\to \,\,2{{H}^{+}}+Cu\]
D) \[{{H}_{2}}+N{{i}^{2+}}\to 2{{H}^{+}}+Ni\]
Correct Answer: B
Solution :
\[When\text{ }E{{{}^\circ }_{cathode}}-E{{{}^\circ }_{anode}}\,is\,\,maximum\]
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