JEE Advanced · 2010 · 11 Apr 2010 · Paper 2 · Chemical Bonding and Molecular Structure

The species having pyramidal shape is

(A) $SO_{3}$
(B) $BrF_{3}$
(C) $SiO_{3}^{2 -}$
(D) $OSF_{2}$ ✓ Correct

Answer: (D)

Solution

OSF_{2}

has a pyramidal shape. The central sulfur atom has one lone pair and three bonding pairs (one double bond to O and two single bonds to F), giving it a tetrahedral electron geometry and pyramidal molecular geometry.

SO_{3}

is trigonal planar,

BrF_{3}

is T-shaped, and

SiO_{3}^{2 -}

is trigonal planar.

JEE Advanced · 2010 · 11 Apr 2010 · Paper 2 · Single correct option

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