A limitation of valence bond theory (VBT) is that:
Correct answer: C. It doesn't explain the paramagnetic behavior of O₂
- A. It doesn't address the shapes of the molecules
- B. It doesn't involve the criteria of bond formation
- C. It doesn't explain the paramagnetic behavior of O₂
- D. None of the above
Explanation
Valence Bond Theory predicts that the O₂ molecule should be diamagnetic because it shows all electrons as paired. However, experiments show that O₂ is paramagnetic. This paramagnetic behavior is correctly explained by Molecular Orbital Theory, revealing a limitation of VBT.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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