Chemistry - CHEMICAL BONDING Question with Solution | TestHub

In BF₃, BCl₃and BBr₃each will shown${\text{p}}_{\pi }-{\text{p}}_{\pi }$back bonding as follows.



Extant of overlapping  as the$2\text{p}-2\text{p}>2\text{p}-3\text{p}>2\text{p}-4\text{p} \;$difference between the size of p orbital increases the extent of overlapping decreases the availability of vacant orbital increases and the acidic character increases.
Hence correct order of Lewis acidity represented by option (BF₃< BCl₃< BBr₃) .