14 H2SO4 (aq) + 2 KMnO4 (aq) + 10 KCl (aq) → 8 H2O (l) + 5 Cl2 (g) + 2 MnSO4 (aq) + 12 KHSO4 (aq)
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, KCl is a reducing agent.
This is a gas evolution reaction, Cl2 is the formed gas.