2 KMnVIIO4 + 10 NaCl-I + 8 H2SO4 5 Na2SO4 + 2 MnIISO4 + K2SO4 + 5 Cl20 + 8 H2O

This is an oxidation-reduction (redox) reaction:

2 MnVII + 10 e- 2 MnII (reduction)

10 Cl-I - 10 e- 10 Cl0 (oxidation)

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