In which molecule does the ntral atom use sp² hybridization with three bonds?
In SO₃, sulfur forms 3 double bonds, requiring 3 hybrid orbitals, achieved by sp² hybridization. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.