Question:

A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is :

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Total electron pairs = 3 bond pairs + 2 lone pairs = 5, i.e. an \(AX_3E_2\) molecule.
Updated On: Nov 4, 2026
  • trigonal pyramidal
  • T-shaped
  • see-saw
  • planar triangular
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The Correct Option is B

Solution and Explanation

Steric number = 3 (bond pairs) + 2 (lone pairs) = 5, so the electron-pair geometry is trigonal bipyramidal (\(sp^3d\)).
Lone pairs prefer the equatorial positions (fewer 90\(^\circ\) repulsions).
With both lone pairs equatorial, the three bonded atoms occupy two axial and one equatorial position, giving a T-shape (e.g. \(ClF_3\)).
Answer: (2) T-shaped
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