Match the species in Column I with the bond order in Column II.
Thus, on calculating we can get the bond order:
(i) (c);
So, Bond Order of NO = (15-10)
= 2.5
(ii) (d);
So, Bond Order of CO = (14-8)
= 3.
(iii) (a);
So, Bond Order of O2- = (10-7)
= 1.5
(iv) (b);
So, Bond Order of O2 = (16-12)
= 2.