Question

In which one of the following molecules is the central atom sp2 hybridized?

Answer 1

Any central atom surrounded by three regions of electron density will exhibit sp² hybridization.

Step-by-step explanation:

Any central atom surrounded by three regions of electron density will exhibit sp² hybridization. This includes molecules with a lone pair on the central atom, such as CINO, or molecules with two single bonds and a double bond connected to the central atom, as in formaldehyde, CH₂O, and ethene, H₂CCH2.