In H2SO4, the central atom is sulfur S . To determine the hybridization of the central atom, we need to consider the number of electron domains around it.Sulfur is in group 6A of the periodic table and has 6 valence electrons. In H2SO4, sulfur forms two single bonds with two hydrogens and two double bonds with two oxygens. This results in a total of 4 electron domains 2 single bonds and 2 double bonds .According to the VSEPR theory, 4 electron domains correspond to a tetrahedral geometry, which requires sp hybridization. Therefore, the hybridization of the central atom sulfur in the H2SO4 molecule is sp.