What type of hybridization does a BCl3 molecule undergo? a) sp b) sp2 c) sp3 d) sp3d Ans. (b) Sol. In the BCl3 molecule, one s-orbital and two p- orbitals intermix and form three equivalent hybrid orbits. Therefore it undergoes sp2 hybridization and forms trigonal planar shape, like B in the center and Cl in the 3 corners.