Fe3+ + e- -> Fe2+

Question

2.
Ce3+ -> Ce4+ + e-



:
Ce3+ -> Ce4+ + e-



3.
2Fe2+ -> 2Fe3+ + 2e-



:
2Fe2+ -> 2Fe3+ + 2e-



4.
Sn4+ + 2e- -> Sn2+



:
Sn4+ + 2e- -> Sn2+



Column B
a.Oxidation
b.Reduction

Answer 1

1. b. Reduction
2. a. Oxidation
3. b. Reduction
4. a. Oxidation