A) \[BF_{4}^{-}\]
B) \[NH_{4}^{+}\]
C) \[CO_{3}^{2-}\]
D) \[SO_{4}^{2-}\]
Correct Answer: C
Solution :
In\[CO_{3}^{2-}\]ion, the C-atom undergoes\[s{{p}^{2}}\] hybridisation. It has triangular planar structure while\[BF_{4}^{-},NH_{4}^{+}\]and\[SO_{4}^{2-}\]have tetrahedral structure.
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