Question:

The molecular geometry of \(\mathrm{SF_6}\) is octahedral. What is the geometry of \(\mathrm{SF_4}\) (including lone pair(s) of electrons, if any)?

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Count bond pairs and lone pairs on S in \(\mathrm{SF_4}\); the question asks for the electron-pair geometry.
Updated On: Nov 5, 2026
  • Tetrahedral
  • Trigonal bipyramidal
  • Square planar
  • Pyramidal
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The Correct Option is B

Solution and Explanation

S has 6 valence electrons; four go into S-F bonds, leaving one lone pair. Steric number \(= 4 + 1 = 5\), hybridisation \(sp^3d\).
Five electron pairs arrange in a trigonal bipyramidal geometry (including the lone pair); the molecular shape (see-saw) differs, but the question asks for the geometry including lone pairs.
Answer: (2) Trigonal bipyramidal
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