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Question
Dry cells are commonly used in clocks, torches, calculators etc. They are the most familiar type of commercial cells.
- What acts as anode and cathode in dry cell?
- Which chemical compounds are filled between anode and cathode of this cell?
- Why do dry cells not have a long life?
Solution
- The anode is Zn, and the graphite rod is the cathode.
- Moist paste of ZnCl2 and NH4Cl.
- NH4Cl paste in dry cell is acidic in nature and corrodes the Zn container.
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