2 H2SO4-II + 2 MnIVO2-II O20 + 2 MnIISO4-II + 2 H2O-II

This is an oxidation-reduction (redox) reaction:

2 MnIV + 4 e- 2 MnII (reduction)

2 O-II - 4 e- 2 O0 (oxidation)

Change the oxidation states