Question

In which of the following molecules are all the bonds not equal?

• A. $Al{F}_3$
• B. $N{F}_3$
• C. $Cl{F}_3$
• D. $B{F}_3$

Answer 1

The correct option is C $Cl{F}_3$

$Cl$ in $Cl{F}_3$ is in $s{p}^{3}d$ hybridization . The molecule has T-shape structure.

Equitorial bonds consists of $s,p_{x}and{p}_y$ orbitals where as the axial bonds consists of $p_{z}and{d}_{z^2}$ orbitals.
Hence the axial bond length is different from equitorial bond length.