Consider the following diagram in which an electrochemical cell is coupled to an electrolytic cell. What will be the polarity of electrodes 'A' an d 'B' in the electrolytic cell?

Explanation

The cell drawn above represents electrochemcial cell in which two different electrodes are fitted in their respectve electrolytic solutin and cell drawn at bottom represents electrolytic cell.
Cell representation can be represented as `Zn|Zn^(2+)||Cu^(2+)|CU`
Zn is loosing electorns which are going towards electrode (A) and copper is accepting electron from electrode B. Hence.
Change on electrode `A=+`
Charge on electrode B=-