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Chemical Bonding and Molecular Structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryChemical Bonding and Molecular Structure1 Mark
MCQ
Which of the following options represents the correct bond order?
  • A
    $\text{O}_{2} > \text{O}_{2} > \text{O}^{+}_{2}$
  • ✓
    $\text{O}^{-}_{2} > \text{O}_{2} > \text{O}^{+}_{2}$
  • C
    $\text{O}_{2} > \text{O}_{2} < \text{O}_{2}$
  • D
    $\text{O}^{-}_{2} < \text{O}_{2} > \text{O}^{+}_{2}$
✓

Answer

Correct option: B.
$\text{O}^{-}_{2} > \text{O}_{2} > \text{O}^{+}_{2}$
Bond order $,\text{O}^{2}=\frac{8-4}{2}=2.0$
Bond order $,\text{O}^{-}_{2}=\frac{8-5}{2}=1.5$
Bond order $,\text{O}^{+}_{2}=\frac{8-3}{2}=2.5$

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