C2-IIH5OH + 4 KMnVIIO4 4 MnIVO2 + 4 KOH + 2 CIVO2 + H2O

This is an oxidation-reduction (redox) reaction:

4 MnVII + 12 e- 4 MnIV (reduction)

2 C-II - 12 e- 2 CIV (oxidation)

KMnO4 is an oxidizing agent, C2H5OH is a reducing agent.