JEE Main Chemistry question

In which reaction does the hybridisation on the central atom change from to ?

(A)
(B)Correct
(C)
(D)

Answer: (B)

Solution

has boron with 3 bond pairs and no lone pair (, electron-deficient); on accepting a fluoride ion, boron gains a fourth bond pair, becoming hybridised in the tetrahedral

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Question ID VK-156074