Question

Among the following molecules, the one with the largest bond angle at the central atom is?

• A. $Cl{F}_3$
• B. $POC{l}_3$
• C. $BC{l}_3$
• D. $S{O}_3$

Answer 1

Answer: (A)

$Cl{F}_3$

$Cl{F}_3$ has trigonal bipiyarmidal geometry in which two fluorine atoms are present at axial position and one fluorine and two lone pair of electrons are present at equitorial position so it has bond angle of ${175}^o$.(Due to repulsion of lone pair of electrons bond angle decreases from ${180}^o$ to ${175}^o$).

$POC{l}_3$ has tetrahedral geometry so it has bond angle of nearly equal to ${109}^o$.

$BC{l}_3$ has trigonal planar geometry so it has bond angle of ${120}^o$.

$S{O}_3$ has trigonal planar geometry so it has bond angle of ${120}^o$.