Question

What is the easiest way to recognize this or what is the clue here to identify? I am understanding that I need to know how many bonding pairs and non-bonding pairs, then I have to memorize the geometry shape. It seems too much of an effort to memorize the whole table of possible arrangement of electrons. Can you please guide me to the right direction? the answer is d)

Which molecule is incorrectly matched with the molecular geometry?

Molecule Molecular Geometry

a. SeF6 octahedral

b. CCl4 tetrahedral

c. SO3 pyramidal

d. SF4 tetrahedral

e. SbH3 pyramidal

Choose the species that is incorrectly matched with the electronic geometry about the central atom.

Molecule Electronic Geometry
a. CF4                     tetrahedral

b. BeBr2                  linear

c. H2O                    tetrahedral

d. NH3                    tetrahedral

e. PF3                     pyramidal

Answer 1

Molecule Molecular Geometry

a. SeF6 octahedral

b. CCl4 tetrahedral

c. SO3 pyramidal(incorrect) correct is trigonal planar

d. SF4 tetrahedral (incorrect) correct is see-saw

e. SbH3 pyramidal

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Molecule Electronic Geometry
a. CF4                     tetrahedral

b. BeBr2                  linear

c. H2O                    tetrahedral(incorrect) correct is angular / bent

d. NH3                    tetrahedral (incorrect) correct is pyramidal

e. PF3                     pyramidal (incorrect ) correct is trigonal planar