7 The diagram shows the apparatus used for the electrolysis of lead(II) bromide using inert electrodes X and Y.
Lead is formed at electrode Y.
Which statement about the electrolysis is correct?
1 )
A green gas is given off at electrode X.
2 )
Electrode Y is the anode.
3 )
Only a physical change takes place when a current is passed.
The electrolyte is in the molten state.
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