If a molecule MX3 has zero dipole moment, the sigma bonding orbitals used by M are:
Correct answer: C. sp2 hybrids
- A. Pure p
- B. sp hybrids
- C. sp2 hybrids
- D. sp3 hybrids
Explanation
In order for MX3 molecule to have zero dipole moment, it must have a symmetrical shape which in this case can only be trigonal planar. The bond angle in this case between X-X would be 120o so it should have sp2 hybrids.
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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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