Chemistry · May / June 2017 · Paper 12 · Question 13

The diagrams show the apparatus for the electrolysis of aqueous copper(II) sulfate. In experiment X both electrodes are inert. In experiment Y both electrodes are made of copper. [diagrams of two electrolysis cells: X with electrode 1 (inert) and electrode 2 (inert); Y with electrode 3 (copper) and electrode 4 (copper)] On which electrodes is solid metal deposited?

1. A1 and 2
2. B1 and 3
3. C2 and 4
4. D3 and 4

As printed in the paper