Choose the incorrect relationship of bond energies:
Correct answer: B. Cl-Cl < F-F
- A. Br-Br > I-I
- B. Cl-Cl < F-F
- C. C≡ C < N≡ N
- D. All are correct
Explanation
This statement is incorrect. While bond energy generally increases up a group, the F-F bond is anomalously weak due to strong repulsion between the lone pairs on the small fluorine atoms. The Cl-Cl bond is significantly stronger than the F-F bond.
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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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