CH-1696
Simple cells
Chemistry · Secondary 4 · Hard · Simple cells
In a simple cell, zinc and silver electrodes are placed in dilute sulfuric acid and connected by a wire. After some time, the bulb goes off because a layer forms on one electrode. Which statement best explains this?
- The acid becomes more concentrated and stops conducting
- Both electrodes dissolve completely so no circuit exists
- A non-conducting layer forms on one electrode, stopping electron flow
- Electrons start moving through the solution instead of the wire
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