question_answer 98)

  Match the species in column I with bond order in column II.  

Column I	Column II
(i)\[NO\]	(a) 1.5
(ii)\[CO\]	(b) 2.0
(iii)\[O_{2}^{-}\]	(c) 2.5
(iv) \[{{O}_{2}}\]	(d) 3.0

 

Answer:

  \[(i-c),(ii-d),(iii-a),(iv-b)\] \[NO:13\]\[KK\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\pi {{(2{{p}_{x}})}^{2}}\]                                                 \[\pi {{(2{{p}_{y}})}^{2}}{{\pi }^{*}}{{(2{{p}_{x}})}^{1}}\] Bond order = \[\frac{8-3}{2}=2.5\] \[CO:12\]\[KK\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma {{(2{{p}_{z}})}^{2}}\pi {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{y}})}^{2}}\] Bond order =\[\frac{8-2}{2}=3.0\] \[{{O}_{2}}\] Bond order = 2 \[O_{2}^{-}\] Bond orders = 1.5