Question

Which of the following matches is not correct?

A. IC12 - Linear ion B. 1C14 - Square planar ion C. XeF2 - Linear molecule D. SO42 - Trigonal planar ion

Answer 1

SO42 - Trigonal planar ion

Step-by-step explanation:

The SO4^2- ion is tetrahedral and not trigonal planar because the sulphur atom has four regions of electron density which includes the lone pair of electrons on sulphur atom.

This accounts for the observed tetrahedral arrangement of electron pairs around the central sulphur atom in SO4^2- ion, hence the answer.