A) \[5\]
B) \[4\]
C) \[3\]
D) \[2\]
Correct Answer: B
Solution :
The electronic configuration of \[O_{2}^{2-}\] ion is \[O_{2}^{2-}-\sigma 1{{s}^{2}},\overset{*}{\mathop{\sigma }}\,1{{s}^{2}},\sigma 2{{s}^{2}},\overset{*}{\mathop{\sigma }}\,2{{s}^{2}},\sigma 2p_{z}^{2},\pi 2p_{x}^{2},\] \[\pi 2p_{y}^{2},\overset{*}{\mathop{\pi }}\,2p_{x}^{2}.\overset{*}{\mathop{\pi }}\,2p_{y}^{2}\] Hence, number of antibonding electron pairs in \[O_{2}^{2-}\] molecular ion are four.
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