First slide

13th group or boron group

Question

Boron cannot form which one of the following anions

Moderate

A

BF₆^3-
B

B(OH)₄^–
C

BO₂^–
D

BH₄^–

Solution

Because of the non-availability of d-orbitals, boron is unable to expand its octet. Hence the maximum covalence of boron cannot exceed 4.So ${BF}_{6}^{- 3}$ is not exist

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