Chemical Bonding - Result Question 53
28. Among the following species, identify the isostructural pairs.
$NF _3, NO _3^{-}, BF _3, H _3 O^{+}, N _3 H$
$(1996,1 M)$
(a) $\left[NF _3, NO _3^{-}\right]$ and $\left[BF _3, H _3 O^{+}\right]$
(b) $\left[NF _3, N _3 H\right]$ and $\left[NO _3^{-}, BF _3\right]$
(c) $\left[NF _3, H _3 O^{+}\right]$ and $\left[NO _3^{-}, BF _3\right]$
(d) $\left[NF _3, H _3 O^{+}\right]$ and $\left[N _3 H, BF _3\right]$
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Answer:
Correct Answer: 28. (c)
Solution:

Therefore, $NF_3$, $H_3O^+$, and $BF_3$, $NO_3^-$ have the same shape.