In which of the following species is the inte | vedclass

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(B) The bond angle of $109^o 28'$ is characteristic of a tetrahedral geometry,which occurs in species with $sp^3$ hybridization and no lone pairs on t

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$(NH_4)^+, BF_3$

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(B) The bond angle of $109^o 28'$ is characteristic of a tetrahedral geometry,which occurs in species with $sp^3$ hybridization and no lone pairs on the central atom.In $(NH_4)^+$,the nitrogen atom is $sp^3$ hybridized with four bonding pairs and zero lone pairs,resulting in a tetrahedral geometry with a bond angle of $109^o 28'$.In $(BF_4)^-$,the boron atom is $sp^3$ hybridized with four bonding pairs and zero lone pairs,resulting in a tetrahedral geometry with a bond angle of $109^o 28'$.Therefore,both $(NH_4)^+$ and $(BF_4)^-$ exhibit this bond angle.

List-$I$	List-$II$
$A. PCl_5$	$I. \text{Tetrahedral}$
$B. BrF_5$	$II. \text{Square Planar}$
$C. BF_4^-$	$III. \text{Trigonal bipyramidal}$
$D. [Ni(CN)_4]^{2-}$	$IV. \text{Square pyramidal}$

In which of the following species is the interatomic bond angle $109^o 28'$?

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