Question

Which of the following statements is/are not true regarding $P{F}_{2}C{l}_3$?

• A. It is $s{p}^{3}d$ hybridized
• B. $F$ occupies the axial positions
• C. The axial bonds are longer than the equatorial bonds
• D. None of the above

Answer 1

The correct option is C The axial bonds are longer than the equatorial bonds


a) In $P{F}_{2}C{l}_3$, the central atom $P$ is bonded to 2 $F$ atoms and 3 $Cl$ atoms. So, the steric number of $P$ is 5 and the hybridization is $s{p}^{3}d$.

b) According to Bent's rule, the more electronegative elements occupy the axial positions. Hence, F occupies the axial postions.

c) Though axial bonds are longer generally, here it is shorter because $P-F$ bond is always shorter than $P-Cl$ bond.