Explanation
From the structural point of the view, we see that,
NF_{3} is pyramidal whereas BF_{3} is planar triangular in structure.
BF^{-}_{4} and NH^{+}_{4} ions both are tetrahedral in structure.
BCl_{3} is triangular planar whereas BrCl_{3} is pyramidal in structure.
NH_{3} is pyramidal whereas NO_{3} is triangular planar structure.
So as we can see the only option B has both the elements same in structure.
The correct answer is option B.
Following is a diagram representation of standard reduction potential values. Which out of the following undergo disproportionation?
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