Chemistry
When electrolysis of molten lead bromide is carried out, the products formed at the respective electrodes are:
| At the positive electrons | At the negative electrode | |
|---|---|---|
| 1. | Bromine | Lead |
| 2. | Bromine | Hydrogen |
| 3. | Lead | Bromine |
| 4. | Lead | Oxygen |
Electrolysis
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Answer
- At the positive electrode — Bromine
At the negative electrode — Hydrogen
Reason — During electrolysis of molten lead bromide,
At the positive electrode — Dark reddish brown fumes of bromine is evolved
Br1- - 1e- ⟶ Br
Br + Br ⟶ Br2
At the negative electrode — Silver gray metal lead is formed.
Pb2+ + 2e- ⟶ Pb
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