MCQ
Isostructural species are those which have the same shape and hybridization. Among the given species identify the isostructural pairs.
  • A
    $\big[\text{NF}_3$  and $\text{BF}_3\big]$
  • $\big[\text{BF}^–4$ and $\text{NH}^+4\big]$
  • C
    $\big[\text{BCl}_3$ and $\text{BrCl}_3]$
  • D
    $\big[\text{NH}_3$ and $\text{No}^–_3\big]$

Answer

Correct option: B.
$\big[\text{BF}^–4$ and $\text{NH}^+4\big]$
$\mathrm{NF}_3$ is pyramidal whereas $\mathrm{BF}_3$ is planar triangular.
$\mathrm{BF}^{-}{ }_4$ and $\mathrm{NH}_4^{+}$ions both are tetrahedral.
$\mathrm{BCl}_3$ is triangular planar whereas $\mathrm{BrCl}_3$ is pyramidal.
$\mathrm{NH}_3$ is pyramidal whereas $\mathrm{NO}_3$ is triangular planar.

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