Question

In which of the following molecule/ion all the bonds are not equal ?

• A. $Xe{F}_4$
• B. $B{F}_4^{-}$
• C. $PC{l}_5$
• D. $Si{F}_4$

Answer 1

Answer: (C)

The geometries of molecules determine the types of bond lengths.
$Xe{F}_4$ -squareplaner $B{F}_4^{-},Si{F}_4$-tetrahedral $PC{l}_5$-trigonalbipyramidal
Trigonal pyramidal has two types of bond lengths : axial and equatorial. Other geometries have identical bond lengths.