• # question_answer Correct order of increasing activity is A) $Cu,$ $Mg,$ $Na$ B) $Na,$ $Mg,$ $Cu$ C) $Mg,$ $Na,$ $Cu$ D) $Cu,$ $Na,$ $Mg$

$C{{u}^{+2}}+2{{e}^{-}}\to Cu$,${{E}^{o}}=+0.34\ V$ $M{{g}^{+2}}+2{{e}^{-}}\to Mg$,${{E}^{o}}=-2.37\ V$ $N{{a}^{+}}+{{e}^{-}}\to Na$,${{E}^{o}}=-2.71\,\,V$