5 C2H5OH (aq) + 2 KMnO4 (aq) + 3 H2SO4 (aq) → 5 C2H4O (aq) + 2 MnSO4 (aq) + K2SO4 (aq) + 8 H2O (l)
This is an oxidation-reduction (redox) reaction:
2 MnVII + 10 e- → 2 MnII (reduction)
10 C-II - 10 e- → 10 C-I (oxidation)
KMnO4 is an oxidizing agent, C2H5OH is a reducing agent.