JEE Main & Advanced Chemistry Alkali Metals Question Bank Alkali Metals

  • question_answer Correct order of increasing activity is

    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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