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ChemistryNEET 2024Hydrogen bonding and dipole moment

Chemical Bonding and Molecular Structure

Identify the correct answer.

  1. A.BF3\mathrm{BF_3} has a non-zero dipole moment
  2. B.The dipole moment of NF3\mathrm{NF_3} is greater than that of NH3\mathrm{NH_3}
  3. C.Three canonical forms can be drawn for the CO32−\mathrm{CO_3^{2-}} ion✓
  4. D.Three resonance structures can be drawn for ozone

Solution

CO32−\mathrm{CO_3^{2-}} has three equivalent resonance structures with the double bond on each oxygen in turn. BF3\mathrm{BF_3} is trigonal planar with zero dipole; NH3\mathrm{NH_3} has a larger dipole than NF3\mathrm{NF_3}; ozone has two resonance structures.

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