A) \[SC{{l}_{4}}\]
B) \[SO_{4}^{2-}\]
C) \[PO_{4}^{3-}\]
D) \[NH_{4}^{+}\]
Correct Answer: A
Solution :
The species having same number of bond pairs and lone pairs are isostructural. \[SiC{{l}_{4}}=(4bp+0lp)\Rightarrow \]tetrahedral structure \[SC{{l}_{4}}=(4bp+1lp)\Rightarrow \]see-saw like structure \[SO_{4}^{2-}(4bp+0lp)\Rightarrow \]tetrahedral structure \[PO_{4}^{3-}(4bp+0lp)\Rightarrow \]tetrahedral structure \[NH_{4}^{+}(4bp+0lp)\Rightarrow \]tetrahedral structure Hence,\[SC{{l}_{4}}\]is not isostructural with\[SiC{{l}_{4}}\].
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