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WBCS Preliminary Examination 2017 — General Studies · Question 115 of 200

Q115
General ScienceChemistry
Geometry of $SF_4$ is
  1. a.square planar
  2. b.tetrahedral
  3. c.octahedral
  4. d.see-saw

Answer: (D) see-saw

$SF_4$ has a see-saw molecular geometry: sulphur's five electron domains (four bonding pairs and one lone pair) arrange in a trigonal bipyramidal electron geometry, but the lone pair's presence distorts the actual molecular shape into a see-saw.