Question 1

Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

Accepted Answer

A)  PCl 3
B)  BF 3
C)  SO 3
D)  BrF 3
E)  CO 3 2−F) C) and D)
G) C) and E)

Question 2

In formaldehyde, CH2O, both the formal charge and the oxidation number of carbon are zero.

Accepted Answer

A) True 
 B)False

Question 3

Bond angles of 180° only occur around atoms which display linear molecular geometry.

Accepted Answer

A) True 
 B)False

Question 4

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

Accepted Answer

A) True 
 B)False

Question 5

In the COCl2 molecule, carbon is the central atom. Based on the best Lewis structure for COCl2, what is the formal charge on carbon?

Accepted Answer

A)  0
B)  +1
C)  −1
D)  +2
E)  −2F) A) and C)
G) C) and D)

Question 6

Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

Accepted Answer

A)  90°
B)  109°
C)  120°
D)  180°
E)  between 110 and 120°F) B) and E)
G) C) and D)

Question 7

What is the molecular shape of ClF2− as predicted by the VSEPR theory?

Accepted Answer

A)  Linear
B)  Bent
C)  See-saw
D)  T-shaped
E)  L-shapedF) A) and D)
G) C) and D)

Question 8

What is the molecular shape of ClF4− as predicted by the VSEPR theory?

Accepted Answer

A)  Square pyramidal
B)  Square planar
C)  See-saw
D)  Octahedral
E)  TetrahedralF) B) and E)
G) C) and D)

Question 9

According to VSEPR theory, a molecule with the general formula AX3E2 will have a __________ molecular shape.

Accepted Answer

A)  trigonal pyramidal
B)  trigonal bipyramidal
C)  trigonal planar
D)  T-shaped
E)  see-sawF) A) and B)
G) A) and C)

Question 10

Select the correct Lewis structure for TeBr2.

Accepted Answer

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G) B) and C)

Question 11

Predict the ideal bond angles in FNO using the molecular shape given by the VSEPR theory.

Accepted Answer

A)  90°
B)  109°
C)  120°
D)  180°
E)  between 120 and 180°F) B) and C)
G) A) and E)

Question 12

Which of the following atoms can expand its valence shell when bonding?

Accepted Answer

A)  N
B)  C
C)  O
D)  P
E)  AlF) A) and E)
G) A) and D)

Question 13

What is the molecular shape of XeO2F2 as predicted by the VSEPR theory? 2F2 as predicted by the VSEPR theory?   A) Square planar B) Tetrahedral C) Square pyramidal D) See-saw E) Octahedral" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Square planar
B)  Tetrahedral
C)  Square pyramidal
D)  See-saw
E)  OctahedralF) A) and D)
G) A) and C)

Question 14

Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF2−.

Accepted Answer

A)  Octahedral
B)  Trigonal bipyramidal
C)  Tetrahedral
D)  Trigonal planar
E)  BentF) A) and E)
G) A) and B)

Question 15

In which one of the following molecules are all the bonds single?

Accepted Answer

A)  O 3
B)  POCl 3
C)  CO
D)  COCl 2
E)  N 2H 4F) B) and D)
G) None of the above

Question 16

What is the molecular shape of SiF62− as predicted by the VSEPR theory? 62− as predicted by the VSEPR theory?   A) Trigonal bipyramidal B) Hexagonal C) Tetrahedral D) See-saw E) Octahedral" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Trigonal bipyramidal
B)  Hexagonal
C)  Tetrahedral
D)  See-saw
E)  OctahedralF) A) and E)
G) A) and B)

Question 17

The formal charge on Cl in the structure shown for the perchlorate ion is

Accepted Answer

A)  −2
B)  −1
C)  0
D)  +1
E)  +2F) C) and D)
G) B) and D)

Question 18

In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

Accepted Answer

A)  CO 2
B)  ClO 3 −
C)  COCl 2
D)  NO 2 +
E)  HCNF) A) and E)
G) C) and D)

Question 19

In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

Accepted Answer

A)  5 and 6
B)  4 and 2
C)  3 and 6
D)  4 and 6
E)  3 and 2F) B) and C)
G) D) and E)

Question 20

How many faces and how many vertexes (corners) , respectively, are there in a trigonal bipyramid?

Accepted Answer

A)  4 and 4
B)  5 and 5
C)  5 and 6
D)  6 and 5
E)  6 and 8F) A) and E)
G) C) and D)

Exam 10: The Shapes of Molecules

Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

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According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

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According to VSEPR theory, a molecule with the general formula AX3E2 will have a __________ molecular shape.

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The formal charge on Cl in the structure shown for the perchlorate ion is

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In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

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What is the molecular shape of XeO2F2 as predicted by the VSEPR theory?

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In the COCl2 molecule, carbon is the central atom. Based on the best Lewis structure for COCl2, what is the formal charge on carbon?

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What is the molecular shape of SiF62− as predicted by the VSEPR theory?

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In formaldehyde, CH2O, both the formal charge and the oxidation number of carbon are zero.

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In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

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How many faces and how many vertexes (corners) , respectively, are there in a trigonal bipyramid?

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What is the molecular shape of ClF4− as predicted by the VSEPR theory?

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In which one of the following molecules are all the bonds single?

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Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

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Predict the ideal bond angles in FNO using the molecular shape given by the VSEPR theory.

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Bond angles of 180° only occur around atoms which display linear molecular geometry.

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Select the correct Lewis structure for TeBr2.

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Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF2−.

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Which of the following atoms can expand its valence shell when bonding?

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What is the molecular shape of ClF2− as predicted by the VSEPR theory?

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Predict the ideal bond angles in AsCl₃using the molecular shape given by the VSEPR theory.

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₃E₂ (where E represents a lone pair on A) will be trigonal planar.

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₃E₂will have a __________ molecular shape.

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What is the molecular shape of XeO₂F₂as predicted by the VSEPR theory?

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In the COCl₂ molecule, carbon is the central atom. Based on the best Lewis structure for COCl₂, what is the formal charge on carbon?

Correct Answer
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What is the molecular shape of SiF₆²⁻as predicted by the VSEPR theory?

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In formaldehyde, CH₂O, both the formal charge and the oxidation number of carbon are zero.

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What is the molecular shape of ClF₄⁻ as predicted by the VSEPR theory?

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Select the correct Lewis structure for TeBr₂.

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Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF₂⁻_.

Correct Answer
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What is the molecular shape of ClF₂⁻ as predicted by the VSEPR theory?

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