Question

The lewis acidity of bf3 is less than bcl3 even though fluorine is more electronegative than chlorine. it is due to

Answer 1

hey mate here your answer

bcoz Lewis acid have a lone pair.
so bf3 have 1 lone pair and bcl3 haven't lone pair only it have one unpaired electron.

so, Lewis acidity of bf3 is less than bcl3.

hope it helps✌✌