Which one is formed at Anode when molten Lead bromide is electrolysed using Graphite as electrode?

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Solution

Lead Bromide( $P b B r_{2}$ ) during electrolysis, Silver-grey colored lead will be deposited at the cathode, and reddish-brown bromine gas will get deposited at the anode electrodes.
The reaction is,
$C a t h o d e : \underset{L e a d i o n}{P b^{2 +}} + 2 e^{-} \to \underset{L e a d}{P b} A n o d e : \underset{B r o m i d e s}{2 B r^{-}} \to \underset{B r o m i n e}{B r_{2}} + 2 e^{-}$
So, Bromine gas is deposited at the Anode.

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