Quiz | Prediction of Molecular Geometries

1

Which of the following species is square planar?

BF4-

SF4

SiF4

XeF4

XeF: AX4E;     BF4: AX;     SF: AX4E ;     SiF: AX4

square planar: AX4E2

2

Which of the following species is T-shaped?

ClO3-

ClF3

PF3

NH3

ClF: AX3E;     PF: AX3E ;     ClO3:     AX3E ;     NH: AX3E

T-shaped: AX3E2

3

What is the electron pair geometry of H2O?

Linear

Bent

Trigonal pyramidal

Tetrahedral

H2O: 4 electron groups around the central oxygen atom (2 neighboring atoms + 2 lone pairs)

4

What is the molecular shape of ICl2-?

Linear

Bent

Trigonal pyramidal

Square planar

ICl2-: 5 electron groups around the central iodine atom (2 neighboring atoms + 3 lone pairs) ⇒ AX2E3

5

Which of the following molecules is nonpolar?

SF2

SF4

SF6

All of the above

SF6 is octahedral (AX6) ⇒ bond dipoles in PF6 cancel each other ⇒ overall dipole moment of PF6 = 0

6

Which of the following molecules has a dipole moment?

CO2

SO2

BF3

None of the above

SO2 is bent (AX2E) ⇒ bond dipoles do not cancel each other ⇒ overall dipole moment of SO2  0