Question

Dry cells are commonly used in clocks, torches, calculators etc. They are the most familiar type of commercial cells.

1. What acts as anode and cathode in dry cell?
2. Which chemical compounds are filled between anode and cathode of this cell?
3. Why do dry cells not have a long life?

Answer 1

1. The anode is Zn, and the graphite rod is the cathode.
2. Moist paste of ZnCl₂ and NH₄Cl.
3. NH₄Cl paste in dry cell is acidic in nature and corrodes the Zn container.