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NEET levelSingle correct optionDifficulty 1 of 3pb008

$BF X_{3}$ acts as a Lewis acid because

Aboron is $s p^{3}$ hybridised in $BF X_{3}$
Bboron has only six electrons in its valence shell and an empty $p$ orbital
Cfluorine has vacant $d$ orbitals
Dboron has a lone pair to donate

Answer: B

In

BF X_{3}

boron is

s p^{2}

hybridised with an incomplete octet and an empty

2 p

orbital, so it accepts a lone pair from a Lewis base.

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More questions on Boron compounds: diborane, boric acid, borax, boron halides