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Question

Which molecule has a 120°bond angle?


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Solution

  1. Boron trifluorideBF3 has a bond angle of120°.
  2. Boron trifluoride has sp2 hybridization. Boron two atomic p orbital and one s orbital combine to form three sp2 hybrid orbitals.
  3. The three sp2 hybrid orbitals combine with the p orbital of each Fluorine atom. Three atoms of Fluorine make the bond with Boron and hence make BF3 sp2 hybridization.
  4. The structure of Boron trifluoride is trigonal planar.
  5. The bonds in Boron trifluoride are purely single that are sigma bonds.
  6. All the atoms lie in one plane and thus make the bond120°. Each of them makes an equilateral triangle.

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