Question

Which of the following statements is true for the electrochemical Daniell cell?

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

Answer 1

Answer: (C)

Daniel cell is an electrochemical cell in which $Cu$ act as cathode and $Zn$ act as anode.

In Daniel cell :
(i) Electron flow from the $Zn$ anode to $Cu$ cathode and direction of current flow is reverse i.e., $Cu$ (cathode) to $Zn$ (anode).
(ii) The cell reaction is
$Zn+C{u}^{2+}⟶Z{n}^{2+}+Cu$
Thus $C{u}^{2+}$ ions (cations) move towards $Cu$ electrode (cathode) and get accumulated as $Cu$ metal.