Question bank/JEE Main/Chemistry

Which of the following statement is false for trisilylamine?

AThree sp2 orbitals are used for s bonding, giving a plane
triangular structure.BThe lone pair of electrons occupy a p-orbital at right angles to
the plane triangle and this overlaps with empty p-orbitals on each of
the three silicon atoms resulting in p bonding.CThe N-Si bond length is shorter than the expected N-Si bond
length.DIt is a weaker Lewis base than trimethyl amine.

Show answer and solution▾

There is $p\pi - d\pi$ delocalization of lone pair of electron
on nitrogen atom and empty d-orbital of silicon but not$p\pi - d\pi$,
one of the 2s-orbital electrons jumps to the last Pz orbital and does
not participate in sp2hybridisation.

Source: Grass-G / CH-19 Chemistry Paper 28 Nov. Fourth.docx