A) \[{{O}_{2}}^{2-}>{{O}_{2}}^{+}>{{O}_{2}}^{-}>{{O}_{2}}\]
B) \[{{O}_{2}}^{+}>{{O}_{2}}^{2+}>{{O}_{2}}^{-}>{{O}_{2}}\]
C) \[{{O}_{2}}^{+}>{{O}_{2}}>{{O}_{2}}^{-}>{{O}_{2}}^{2-}\]
D) \[{{O}_{2}}>{{O}_{2}}^{-}>{{O}_{2}}^{2-}>{{O}_{2}}^{+}\]
Correct Answer: C
Solution :
| Species | Total\[{{e}^{-}}\] | Configurations | Bond order |
| \[{{O}_{2}}\] | 16 | KK \[\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\]\[\sigma {{(2{{p}_{z}})}^{2}}\]\[\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\]\[{{\pi }^{*}}{{(2{{p}_{x}})}^{1}}\]\[{{\pi }^{*}}{{(2py)}^{1}}\] | \[\frac{(8-4)}{2}=2.0\] |
| \[{{O}^{2+}}\] | 15 | KK \[\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\]\[\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\]\[{{\pi }^{*}}{{(2{{p}_{x}})}^{1}}\] | \[\frac{(8-3)}{2}=2.5\] |
| \[{{O}_{2}}^{-}\] | 17 | KK \[\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\]\[\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}{{\pi }^{*}}{{(2{{p}_{x}})}^{2}}\] \[{{\pi }^{*}}{{(2{{p}_{y}})}^{1}}\] | \[\frac{(8-5)}{2}=1.5\] |
| \[{{O}_{2}}^{2-}\] | 18 | KK \[\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\] \[\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}{{\pi }^{*}}{{(2{{p}_{x}})}^{2}}\] \[{{\pi }^{*}}{{(2{{p}_{y}})}^{2}}\] | \[\frac{(8-6)}{2}=1.0\] |
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