BeCl₂
BF₃
CH₄
CCl₄

2.  Which of the following is the correct order for the electron pair repulsions?

lone pair-lone pair < bond pair-bond pair < bond pair-lone pair
lone pair-lone pair < bond pair-lone pair < bond pair-bond pair
bond pair-bond pair < bond pair-lone pair < lone pair-lone pair
bond pair-bond pair < lone pair-lone pair < bond pair-lone pair

3.  Which of the following is not a trigonal planar molecule?

AlCl₃
AlH₃
BF₃
NH₃

4.  Which of the following is tetrahedral?

BF₃
CH₄
NH₃
SF₆

5.  The shape of a molecule with six bond pairs and no lone pairs is...

hexahedral
octahedral 
tetrahedral
trigonal bipyramidal

6.  Which one of following molecules does not have any three of its atoms in a straight line?

BeCl₂
CO₂
H₂O
SF₆

7.  The bond angles in a molecule of boron trifluoride are...

90°
107°
109.5°
120°

8.  The bond angles in PF₅ are...

all 72°
90° and 120°
109.5° and 120°
109.5° and 90°

9.  Which of the following species has a shape based on two lone pairs and two bond pairs?

NH₃
NH₂^-
NH₄⁺
PH₃

10.  The shape of carbon dioxide is described as...

linear
octahedral
tetrahedral
trigonal planar

11.  The H-N-H bond angles in the ammonium ion NH₄⁺ are...

greater than the H-N-H bond angles in ammonia
identical H-N-H bond angles in ammonia
107°
less than the H-N-H bond angles in ammonia

12.  The shape of XeF₄ molecules is based on them having...

4 bond pairs
4 bond pairs and 1 lone pair
4 bond pairs and 2 lone pairs
4 bond pairs and 4 lone pairs

13.  Which one of the following molecules/ions is square planar?

CH₄
NH₄⁺
PCl₄⁺
XeF₄

14.  The molecule whose shape is based on lone pairs is...

CH₄
CO₂
H₂O
SF₆

15.  The ion whose shape is not based on lone pairs is...

NH₄⁺
NH₂^-
H₃O⁺
PCl₄^-

16.  Which of the following statements about ammonia molecules is not true?

they possess a lone pair
the H-N-H bond is 107°
they are pyramidal in shape
they are tetrahedral in shape

17.  Which of the following statements about SO₂ molecules is true?

the O=S=O bond angle is 180°
their shape is based on then having two lone pairs and two double bond pairs
their shape is based on then having one lone pair and two bond bond pairs
they are trigonal planar

18.  Which of following best describes the shape of SO₃ molecules?

linear
square planar
tetrahedral
trigonal planar

19.  In which of the following changes are the bond angles in the second species smaller than the first?

H₂O and H₃O⁺
CH₄ and CO₂
NH₄⁺ and NH₃
AlCl₄^- and AlCl₃

20.  The shape of BrF₃ is best described as...

linear
pyramidal
trigonal planar
T-shaped