Which of the following specie(s) has/have a tetrahedral structure?

B_{2} H_{6}

(around each boron atom)

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B_{3} N_{3} H_{6}

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B H_{4}^{-}

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A l {C l}_{4}^{-}

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Solution

The correct options are
A $B_{2} H_{6}$ (around each boron atom)
C $B H_{4}^{-}$
D $A l {C l}_{4}^{-}$
In $B_{3} N_{3} H_{6}$ , the $B$ and $N$ are ${s p}^{2}$ hybridised. Therefore, it has a triangular structure.

But in all other molecules, central atom-like $A l$ and $B$ are ${s p}^{3}$ hybridised and have a tetrahedral structure.
The structures of all the given molecules are shown:

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Question 07

Which of the following species has tetrahedral geometry?

(a) $B H_{4}^{-}$

(b) $N H_{2}^{-}$

(d) $H_{3} O^{+}$

B = 5, S = 16, O = 8, X e = 54)

B = 5, S = 16, O = 8, X e = 54)

N a_{2} [B_{4} O_{5} (O H)_{4}] .8 H_{2} O

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