NEET 2023 Phase 2 · ChemistryPrevious Year Question

Which of the following statements is not correct about diborane?

Answer: (D) Both the boron atoms are $s p^{2}$ hybridised.. \textbf{Answer:} (D) Both the boron atoms are $s p^{2}$ hybridised.

A.There are two 3-centre-2-electron bonds.
B.The four terminal B–H bonds are two-centre two-electron bonds.
C.The four terminal hydrogen atoms and the two boron atoms lie in one plane.
D.Both the boron atoms are $s p^{2}$ hybridised.✓

Correct Answer

(D) Both the boron atoms are $s p^{2}$ hybridised.

Solution & Explanation

\textbf{Answer:} (D) Both the boron atoms are $s p^{2}$ hybridised. \textbf{Solution:} Each boron in diborane ( $B X_{2} H X_{6}$ ) is $s p^{3}$ hybridised, not $s p^{2}$ , accounting for the four terminal 2c-2e B–H bonds and the two bridging 3c-2e B–H–B bonds.

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