Question

When applied external opposite potential in case of Daniell cell is less than $1.1V$, then

• A. the cell behaves like an electrolytic cell
• B. electrons flow from zinc rod to copper rod
• C. zinc deposites at the zinc electrode and copper dissolves from copper rod
• D. Current flow from zinc rod to copper rod

Answer 1

Answer: (B)

When $E_{\text{ext }}<1.1V$
(i) Electrons flow from zinc electrode to copper electrode, hence, current flows from copper to zinc electrode.
(ii) Zinc dissolves at anode and copper deposites at cathode.