Question

The correct increasing bond angle among $B{F}_3,P{F}_3$ and $Cl{F}_3$ follows the order:

• A. $B{F}_3<P{F}_3<Cl{F}_3$
• B. $P{F}_3<B{F}_3<Cl{F}_3$
• C. $Cl{F}_3<P{F}_3<B{F}_3$
• D. $B{F}_3=P{F}_3=Cl{F}_3$

Answer 1

Answer: (C)

$Cl{F}_3<P{F}_3<B{F}_3$

${BF}_3$ is trigonal planar which makes the angle as ${120}^0$.${PF}_3$ is trigonal bipyramidal making the angle slightly less than ${109}^0$${ClF}_3$ is T-shaped making the least angle.