Question

Correct order of increasing activity is.

• A. $Cu,$ $Mg,$ $Na$
• B. $Na,$ $Mg,$ $Cu$
• C. $Mg,$ $Na,$ $Cu$
• D. $Cu,$ $Na,$ $Mg$

Answer 1

Answer: (A)

$Cu,$ $Mg,$ $Na$

Answer 2

$Cu^{+ 2} + 2e^{-} \rightarrow Cu$,$E^{o} = + 0.34\mspace{6mu} V$

$Mg^{+ 2} + 2e^{-} \rightarrow Mg$,$E^{o} = - 2.37\mspace{6mu} V$

$Na^{+} + e^{-} \rightarrow Na$,$E^{o} = - 2.71V$