MCQ
The process of lead action in a simple voltaic cell:
- ACatalyses the process of electrolysis.
- BIncreases the efficiency of the cell.
- ✓Decreases the efficiency of the cell.
- DIncreases the charge carriers.
✓
Answer
Correct option: C.
Decreases the efficiency of the cell.
The process of lead action in a simple voltaic cell is a chemical action that occurs while the current is flowing and causes hydrogen bubbles to form on the surface of anode. The action is called polarization. Some hydrogen bubbles rise to the surface of the electrolyte and escape into the air and some remain on the surface of the anode. If enough bubbles remain around the anode, the bubbles form a barrier that increases internal resistance. When the internal resistance of the cell increases, the output current is decreased and the voltage of the cell also decreases.
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