State one relevant observation for the following:
At the anode when aqueous copper sulphate solution is electrolyzed using copper electrodes.

Nothing is left at the anode as copper atoms form copper ions and migrate towards the cathode.

Give appropriate scientific reason for the following statement:
During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes.

The electrical conductivity of acetic acid is less in comparison to the electrical conductivity of dilute sulphuric acid at a given concentration ?

Electrolysis of molten lead bromide is considered to be a redox reaction.