During the electrolysis of molten lead bromide which of the following takes place :

Options

A. Bromide is released at the cathode
B. Lead is deposited at the anode
C. Bromide ions gain electrons
D. Lead is deposited at the cathode

Explanation

**Step-by-Step Solution:**

1. **Understanding Electrolysis**: Electrolysis is a process that uses electrical energy to drive a non-spontaneous chemical reaction. In this case, we are looking at the electrolysis of molten lead bromide (PbBr₂).

2. **Setup of Electrolysis**: In the electrolysis setup, we have two electrodes: an anode (positive electrode) and a cathode (negative electrode). The lead bromide is molten, meaning it is in a liquid state and can conduct electricity.

3. **Dissociation of Lead Bromide**: When lead bromide is molten, it dissociates into its ions:
- Lead ions (Pb²⁺) and bromide ions (Br⁻).

4. **Movement of Ions**:
- The cations (Pb²⁺) move towards the cathode (negative electrode).
- The anions (Br⁻) move towards the anode (positive electrode).

5. **Reactions at the Electrodes**:
- **At the Anode**: Oxidation occurs. The bromide ions (Br⁻) lose electrons to form bromine gas (Br₂):
\[ 2 \text{Br}^- \rightarrow \text{Br}_2 + 2 \text{e}^- \]
- **At the Cathode**: Reduction occurs. The lead ions (Pb²⁺) gain electrons to form lead metal (Pb):
\[ \text{Pb}^{2+} + 2 \text{e}^- \rightarrow \text{Pb} \]

6. **Final Products**: The products of the electrolysis of molten lead bromide are:
- Bromine gas (Br₂) is released at the anode.
- Lead metal (Pb) is deposited at the cathode.

7. **Conclusion**: From the options given in the question, the correct statement is that lead is deposited at the cathode.