question_answer

Which one of the following has the regular tetrahedral structure? (At. nos.\[B=5,S=16,Ni=28,\text{ }Xe=54\])

A) \[Xe{{F}_{4}}\]                 

B)        \[S{{F}_{4}}\]    

C)        \[BF_{4}^{-}\]   

D)        \[{{[Ni{{(CN)}_{4}}]}^{2-}}\]

Correct Answer: C

Solution :

Tetrahedral structure is associated with\[s{{p}^{3}}\] hybridised central atom without any lone pair. The structure of all the compounds given are as follows

\[Xe{{F}_{4}}\]		Distorted octahedral
\[{{[Ni{{(CN)}_{4}}]}^{2-}}\]		Square planar
\[S{{F}_{4}}\]		Distorted trigonal bipyramidal
\[BF_{4}^{-}\]		Tetrahedral