Redox and Electrochemical Cells

1) From the following 4 metals, which combination would you use to make a cell that would generate the largest potential difference? Zn, Cu, Fe and Ni.

2) From the combination deduced from above, which would be connected to the anode and which would be connected to the cathode? (labelling the electrode connected to the positive terminal of the voltmeter as the right-hand electrode).

3) Write the half-equations for the cell.

4) Does the anode and cathode change if the electrode connected to the positive terminal of the voltmeter is changed?

5) Does the cell reaction change?