Question

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

• A. Lead is deposited at the cathode
  
• B. Bromine ions gain electrons
  
• C. Lead is deposited at the anode
  
• D. Bromine is releases at the cathode
  

Answer 1

The correct option is A Lead is deposited at the cathode


Correct Answer: $D$. Lead is deposited at the cathode.

The reaction takes place during the electrolysis of molten lead $\left(Ⅱ\right)$ bromide are,

At cathode: $P{b}^{2+}+2e^{-}\to Pb\left(s\right)$

At anode: $B{r}^{-}-e^{-}\to Br$

$Br+Br\to B{r}_2\left(g\right)$

The overall reaction is:
$PbB{r}_2\left(l\right)\to Pb\left(s\right)+B{r}_2\left(g\right)$