A) \[B{{I}_{3}}\] is the weakest Lewis acid among the boron halides
B) there is minimum \[p\pi -p\pi \] back bonding in \[B{{F}_{3}}\]
C) \[B{{F}_{3}}\] is the strongest Lewis acid among the other boron halides
D) there is maximum \[p\pi -p\pi \] back bonding in \[B{{F}_{3}}\].
Correct Answer: D
Solution :
: There is maximum \[p\pi -p\pi \] back bonding in \[B{{F}_{3}}\] due to identical size of 2p orbitals of B and F.
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