In which of the following pairs of molecules/ions, the cent…

Chemistry Chemical Bonding and Molecular Structure NEET Previous Year Question Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

In which of the following pairs of molecules/ions, the central atoms have sp 2 hybridization ?

NO 2– and NH 3

BF 3 and NO 2–

NH 2– and H 2 O

BF 3 and NH 2–

Text Solution

Verified by Experts

The correct answer is:

For sp 2 hybridisation, there must be 3 σ -bonds or 2 σ -bonds along with a long pair of electrons.

(i) NO 2– ⇒ 2 σ + 1 λ p = 3, i.e., sp 2 hybridisation (ii) NH 3 ⇒ 3 σ + 1 λ p = 4, i.e., sp 3 hybridisation

(iii) BF 3 ⇒ 3 σ + 0 λ p = 3, i.e., sp 2 hybridisation (iv) NH 2– ⇒ 2 σ + 2 λ p = 4, i.e., sp 3 hybridisation

(v) H 2 O ⇒ 2 σ + 2 λ p = 4, i.e., sp 3 hybridisation

Thus, among the given pairs, only BF 3 and NO 2– have sp 2 hybridisation.

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