A) \[Cu,\] \[Mg,\] \[Na\]
B) \[Na,\] \[Mg,\] \[Cu\]
C) \[Mg,\] \[Na,\] \[Cu\]
D) \[Cu,\] \[Na,\] \[Mg\]
Correct Answer: A
Solution :
\[C{{u}^{+2}}+2{{e}^{-}}\to Cu\],\[{{E}^{o}}=+0.34\ V\] \[M{{g}^{+2}}+2{{e}^{-}}\to Mg\],\[{{E}^{o}}=-2.37\ V\] \[N{{a}^{+}}+{{e}^{-}}\to Na\],\[{{E}^{o}}=-2.71\,\,V\]
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