Question

Which of the following is true for the electrochemical Daniel cell?

• A. Electrons flow from copper electrode to zinc electrode
• B. Current flows from zinc electrode to copper electrode
• C. Cations move towards copper electrode
• D. Anions move towards copper electrode

Answer 1

The correct option is C Cations move towards copper electrode

The half reactions of whole redox reactions are
$Zn\to Z{n}^{2+}+2e^{-}C{u}^{2+}+2e^{-}\to Cu$
As zinc is oxidizing, it dissolves and forms $Z{n}^{2+}$ ions leaving the electrons in the rod which transfer to the Cu rod which are used in reducing the $C{u}^{2+}$ ions as $C{u}^{2+}+2e^{-}\to Cu$
So the electrons transfer from Zn rod to Cu rod.
So the current flows exactly opposite to the flow of electrons i.e., from Cu to Zn rod.