Question

Isostructural species are those which have the same shape and hybridisation. Among the given species, identify the isostructural pairs.

• A. $\lbrack NF_{3}andBF_{3}\rbrack$
• B. $\lbrack BF_{4}^{-}andNH_{4}^{+}\rbrack$
• C. $\lbrack BCl_{3}andBrCl_{3}\rbrack$
• D. $\lbrack NH_{3}andNO_{3}^{-}\rbrack$

Answer 1

Answer: (B)

$\lbrack BF_{4}^{-}andNH_{4}^{+}\rbrack$

Answer 2

: $NF_{3}$ (Pyramida) and $BF_{3}$ (trigonal planar)

$BF_{4}^{-}$ (tetrahedral) and $N{H_{4}}^{+}$ (tetrahedral)

$BCl_{3}$ (trigonal planar) and $BrCl_{3}$ (trigonal bipyramidal)$NH_{3}$ (Pyramida) and $NO_{3}^{-}$ (trigonal planar)

$Thus,BF_{4}^{-}$and $NH_{4}^{+}$are isostructural species.