A) \[NO_{3}^{-}\]
B) \[CO_{3}^{-2}\]
C) \[BO_{3}^{-3}\]
D) \[SO_{3}^{-2}\]
Correct Answer: D
Solution :
\[:\overset{.\,\,.}{\mathop{O}}\,=\underset{\underset{.\,\,.\,\,}{\mathop{O:}}\,}{\mathop{\underset{||\,\,\,\,}{\mathop{S\,}}\,}}\,=\overset{.\,\,.}{\mathop{O}}\,:\] 5 atoms has 12 electrons in its outermost shell. One \[(S-O)\pi \] bond will be (p-p) p bond while two \[(S-O)\pi \] bond will be (p-d) p bond.
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