A) \[{{O}_{2}}\]
B) \[{{N}_{2}}\]
C) \[{{C}_{2}}\]
D) \[{{B}_{2}}\]
Correct Answer: A
Solution :
The molecular electronic configuration of\[{{O}_{2}}\] molecule is as: \[{{O}_{2}}:KK{{(\sigma 2s)}^{2}}{{({{\sigma }^{*}}2s)}^{2}}{{(\sigma 2{{P}_{z}})}^{2}}{{(\pi 2{{p}_{x}})}^{2}}\] \[{{(\pi 2{{p}_{y}})}^{2}}{{({{\pi }^{*}}2{{p}_{x}})}^{1}}{{({{\pi }^{*}}2{{P}_{y}})}^{1}}\] Hence,\[{{O}_{2}}\]molecule has unpaired electron in the anti-bonding molecular orbitals.
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