Question 1

What is the molecular geometry of the thiocyanate anion, SCN-, as predicted by the VSEPR model? (Carbon is the central atom.)

Accepted Answer

A)  linear 
B)  bent 
C)  tetrahedral 
D)  trigonal planar 
E)  trigonal pyramidal 
A)  linear 
B)  bent 
C)  tetrahedral 
D)  trigonal planar 
E)  trigonal pyramidal

Question 2

Consider the species F2+, F2, and F2-. Which of these species will be paramagnetic?

Accepted Answer

A)  F2+, F2, and F2- 
B)  F2+ and F2 
C)  F2 and F2- 
D)  F2+ and F2- 
E)  None is paramagnetic. 
A)  F2+, F2, and F2- 
B)  F2+ and F2 
C)  F2 and F2- 
D)  F2+ and F2- 
E)  None is paramagnetic.

Question 3

Valence bond theory predicts that carbon will use ________ hybrid orbitals in the carbonate anion, CO32-.

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  sp3d2

Question 4

What does the abbreviation VSEPR stand for?

Accepted Answer

A)  Very Specific Electron and Proton Repair 
B)  Variable Selective of Electron and Protons 
C)  Valence Shell for Every Proton 
D)  Very Selective Electron Pair theory 
E)  Valence-Shell Electron-Pair Repulsion 
A)  Very Specific Electron and Proton Repair 
B)  Variable Selective of Electron and Protons 
C)  Valence Shell for Every Proton 
D)  Very Selective Electron Pair theory 
E)  Valence-Shell Electron-Pair Repulsion

Question 5

A molecule which contains polar bonds will always have a dipole moment.

Accepted Answer

A) True 
 B)False

Question 6

Which is the most reasonable prediction for the H-N-H bond angle in NH3?

Accepted Answer

A)  90° 
B)  109.5° 
C)  120° 
D)  107° 
E)  105° 
A)  90° 
B)  109.5° 
C)  120° 
D)  107° 
E)  105°

Question 7

For a homonuclear diatomic molecule, which molecular orbital is the lowest in energy?

Accepted Answer

A)    
B)    
C)    
D)    
E)  All of these orbitals have the same energy. 
A)    
B)    
C)    
D)    
E)  All of these orbitals have the same energy.

Question 8

According to the VSEPR model, what is the predicted Cl-C-Cl bond angle in CCl4?

Accepted Answer

A)  90° 
B)  109.5° 
C)  120° 
D)  145° 
E)  180° 
A)  90° 
B)  109.5° 
C)  120° 
D)  145° 
E)  180°

Question 9

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as CO2?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  0 
E)  4 
A)  1 
B)  2 
C)  3 
D)  0 
E)  4

Question 10

Which statement about orbital hybridization is incorrect?

Accepted Answer

A)  The carbon atom in CH4 is sp3 hybridized. 
B)  The carbon atom in CO2 is sp hybridized. 
C)  The nitrogen atom in NH3 is sp2 hybridized. 
D)  sp2 hybrid orbitals are coplanar, and at 120° to each other. 
E)  sp hybrid orbitals lie at 180° to each other. 
A)  The carbon atom in CH4 is sp3 hybridized. 
B)  The carbon atom in CO2 is sp hybridized. 
C)  The nitrogen atom in NH3 is sp2 hybridized. 
D)  sp2 hybrid orbitals are coplanar, and at 120° to each other. 
E)  sp hybrid orbitals lie at 180° to each other.

Question 11

Use the VSEPR model to predict the molecular geometry of CO32−.

Accepted Answer

Question 12

According to the VSEPR model, what is the predicted electron-domain geometry around the central iodine atom in the ion lF2-?

Accepted Answer

A)  octahedral 
B)  trigonal bipyramidal 
C)  tetrahedral 
D)  trigonal planar 
E)  bent 
A)  octahedral 
B)  trigonal bipyramidal 
C)  tetrahedral 
D)  trigonal planar 
E)  bent

Question 13

The number of lone pairs of electrons on the central atoms is an important factor used to determine the molecular shape or molecular geometry.

Accepted Answer

A) True 
 B)False

Question 14

To correctly determine the molecular shape of a molecule requires that you first draw the Lewis structure for the molecule.

Accepted Answer

A) True 
 B)False

Question 15

According to the VSEPR model, which molecule is predicted to have a molecular geometry that is trigonal bipyramidal?

Accepted Answer

A)  SF4 
B)  XeF4 
C)  NF3 
D)  SF6 
E)  PF5 
A)  SF4 
B)  XeF4 
C)  NF3 
D)  SF6 
E)  PF5

Question 16

According to the VSEPR model, a molecule with the general formula AB3 with no lone pairs on the central atom will have a ________ molecular shape.

Accepted Answer

A)  linear 
B)  bent 
C)  trigonal planar 
D)  tetrahedral 
E)  trigonal pyramidal 
A)  linear 
B)  bent 
C)  trigonal planar 
D)  tetrahedral 
E)  trigonal pyramidal

Question 17

What name is given to the shape of a molecule with no lone pairs of electrons on the central atom and 6 electron domains on the central atom?

Accepted Answer

The answer of What name is given to the shape...

Question 18

________ is the electron-domain geometry and ________ is the molecular geometry for ammonia.

Accepted Answer

Tetrahedra

Question 19

Water has ________ (number) lone pair(s) of electrons on the central oxygen.

Accepted Answer

The answer of Water has ________ (number) lone pair(s) of...

Question 20

What is the predicted molecular geometry of the IBr3 molecule according to the VSEPR model?

Accepted Answer

A)  tetrahedral 
B)  T-shaped 
C)  bent 
D)  trigonal planar 
E)  seesaw 
A)  tetrahedral 
B)  T-shaped 
C)  bent 
D)  trigonal planar 
E)  seesaw

Exam 9: Chemical Bonding II: Molecular Geometry and Bonding Theories

What is the molecular geometry of the thiocyanate anion, SCN-, as predicted by the VSEPR model? (Carbon is the central atom.)

Consider the species F2+, F2, and F2-. Which of these species will be paramagnetic?

Valence bond theory predicts that carbon will use ________ hybrid orbitals in the carbonate anion, CO32-.

What does the abbreviation VSEPR stand for?

A molecule which contains polar bonds will always have a dipole moment.

Which is the most reasonable prediction for the H-N-H bond angle in NH3?

For a homonuclear diatomic molecule, which molecular orbital is the lowest in energy?

According to the VSEPR model, what is the predicted Cl-C-Cl bond angle in CCl4?

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as CO2?

Which statement about orbital hybridization is incorrect?

Use the VSEPR model to predict the molecular geometry of CO32−.

According to the VSEPR model, what is the predicted electron-domain geometry around the central iodine atom in the ion lF2-?

The number of lone pairs of electrons on the central atoms is an important factor used to determine the molecular shape or molecular geometry.

To correctly determine the molecular shape of a molecule requires that you first draw the Lewis structure for the molecule.

According to the VSEPR model, which molecule is predicted to have a molecular geometry that is trigonal bipyramidal?

According to the VSEPR model, a molecule with the general formula AB3 with no lone pairs on the central atom will have a ________ molecular shape.

What name is given to the shape of a molecule with no lone pairs of electrons on the central atom and 6 electron domains on the central atom?

________ is the electron-domain geometry and ________ is the molecular geometry for ammonia.

Water has ________ (number) lone pair(s) of electrons on the central oxygen.

What is the predicted molecular geometry of the IBr3 molecule according to the VSEPR model?

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Filters

What is the molecular geometry of the thiocyanate anion, SCN^-, as predicted by the VSEPR model? (Carbon is the central atom.)

Consider the species F₂⁺, F₂, and F₂^-. Which of these species will be paramagnetic?

Valence bond theory predicts that carbon will use ________ hybrid orbitals in the carbonate anion, CO₃^2-.

Which is the most reasonable prediction for the H-N-H bond angle in NH₃?

According to the VSEPR model, what is the predicted Cl-C-Cl bond angle in CCl₄?

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as CO₂?

Use the VSEPR model to predict the molecular geometry of CO₃²⁻.

According to the VSEPR model, what is the predicted electron-domain geometry around the central iodine atom in the ion lF₂^-?

According to the VSEPR model, a molecule with the general formula AB₃ with no lone pairs on the central atom will have a ________ molecular shape.

is the electron-domain geometry and is the molecular geometry for ammonia.

What is the predicted molecular geometry of the IBr₃ molecule according to the VSEPR model?