Which of the following statements is true about diborane?
Diborane is a linear molecule.
Diborane is a planar molecule.
Diborane has sp2 hybridization.
Diborane has sp3 hybridization.
Diborane (B2H6) is a planar molecule with a bridged structure. Each boron atom in diborane has three hydrogen atoms bonded to it and one boron-boron bond, resulting in a total of four electron pairs around each boron atom. This geometry is only possible if the molecule is planar. Diborane does not have sp2 or sp3 hybridization because the boron atoms do not have enough electrons to hybridize their orbitals.
Hence option B is the correct answer.