Boron cannot form which one of the following anions ?A. `BF_(6)^(3-)`B. `BH_(4)^(-)`C. `B(OH)_(4)^(-)`D. `BO_(2)^(-)`

Boron cannot form which one of the following anions ?A. `BF_(6)^(3-)`B

1.	Boron cannot form which one of the following anions ?A. `BF_(6)^(3-)`B. `BH_(4)^(-)`C. `B(OH)_(4)^(-)`D. `BO_(2)^(-)`
Answer» Correct Answer - A Due to absence of d-orbitals , B cannot extend its covalency beyond 4 and hence it can form `BF_(4)^(-), [B(OH)_(4)]^(-)` and `BO_(2)^(-)` but not `BF_(6)^(3-)`.

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