3 H2SO4 (aq) + 2 KMnO4 (aq) + 5 Na2SO3 (aq) → 3 H2O (l) + K2SO4 (aq) + 5 Na2SO4 (aq) + 2 MnSO4 (aq)
This is an acid-base reaction (neutralization): H2SO4 is an acid, Na2SO3 is a base.
This is an oxidation-reduction (redox) reaction:
2 MnVII + 10 e- → 2 MnII (reduction)
5 SIV - 10 e- → 5 SVI (oxidation)
KMnO4 is an oxidizing agent, Na2SO3 is a reducing agent.