In the compound CHCl3 chloroform , the central atom is carbon. To determine the hybridization of the central carbon atom, we need to consider its electron domains.Carbon has 4 valence electrons, and it forms one bond with hydrogen and three bonds with chlorine atoms. This gives carbon a total of four electron domains one for each bond . According to the VSEPR theory, when a central atom has four electron domains, it adopts a tetrahedral geometry, and the hybridization of the central atom is sp3. So, the hybridization of the central carbon atom in CHCl3 is sp3.