A) \[O_{2}^{2-}<O_{2}^{-}<{{O}_{2}}<O_{2}^{+}\]
B) \[O_{2}^{+}<O_{2}^{2-}<O_{2}^{-}<{{O}_{2}}\]
C) \[O_{2}^{2-}<O_{2}^{-}<O_{2}^{+}<{{O}_{2}}\]
D) \[{{O}_{2}}<O_{2}^{+}<O_{2}^{2-}<O_{2}^{-}\]
Correct Answer: A
Solution :
This can be explained by the given table.Species | Configuration | Bond order |
\[{{O}_{2}}\] | \[KK\sigma {{(2s)}^{2}}{{\sigma }^{*}}(2{{s}^{2}})\]\[\sigma {{(2{{p}_{z}})}^{2}}\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}{{\pi }^{*}}\]\[(2{{p}_{x}})\]\[{{\pi }^{*}}{{(2{{p}_{y}})}^{1}}\] | \[\frac{(8-4)}{2}=2\] |
\[{{O}_{2}}^{+}\] | \[KK\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\] \[\sigma {{(2{{p}_{z}})}^{2}}\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\] \[{{\pi }^{*}}{{(2{{p}_{x}})}^{1}}\] | \[\frac{(8-3)}{2}=2.5\] |
\[{{O}_{2}}^{-}\] | \[KK\,\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma (2{{p}_{z}})\] \[^{2}\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\]\[{{\pi }^{*}}{{(2{{p}_{x}})}^{2}}{{\pi }^{*}}\]\[{{(2{{p}_{y}})}^{1}}\] | \[\frac{(8-5)}{2}=1.5\] |
\[{{O}_{2}}^{2-}\] | \[KK\,\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma (2{{p}_{z}})\]\[^{2}\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\]\[{{\pi }^{*}}{{(2{{p}_{x}})}^{2}}{{\pi }^{*}}\]\[{{(2{{p}_{y}})}^{2}}\] | \[\frac{8-6}{2}=1.0\] |
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