Q68
General ScienceChemistry
Which species does not contain at least one 90° bond angle?
- a.CF$_4$
- b.PF$_5$
- c.SF$_6$
- d.SiF$_6^{2-}$
Answer: (A) CF$_4$
CF$_4$ is tetrahedral, with all F–C–F angles 109.5°. PF$_5$ is trigonal bipyramidal (axial–equatorial angles of 90°), and SF$_6$ and SiF$_6^{2-}$ are octahedral with 90° angles.