Question 1

What are the bond angles in the following molecular model of BBr3?

Accepted Answer

A) less than 109.5° 
B) 109.5° 
C) less than 120° but greater than 109.5° 
D) 120° 
A) less than 109.5° 
B) 109.5° 
C) less than 120° but greater than 109.5° 
D) 120°

Question 2

What is the molecular geometry of SbCl3?

Accepted Answer

A) T-shaped 
B) tetrahedral 
C) trigonal planar 
D) trigonal pyramidal 
A) T-shaped 
B) tetrahedral 
C) trigonal planar 
D) trigonal pyramidal

Question 3

The following ball-and-stick molecular model is a representation of the amino acid alanine (unshaded spheres = H).Only the connections between atoms are shown;multiple bonds and nonbonded electrons are not indicated.  
-In order to complete an electron-dot structure of alanine,the oxygen atom labeled O2 needs

Accepted Answer

A) 1 additional bond and 1 nonbonded pair of electrons. 
B) 1 additional bond and 2 nonbonded pairs of electrons. 
C) 1 nonbonded pair of electrons. 
D) 2 nonbonded pairs of electrons. 
A) 1 additional bond and 1 nonbonded pair of electrons. 
B) 1 additional bond and 2 nonbonded pairs of electrons. 
C) 1 nonbonded pair of electrons. 
D) 2 nonbonded pairs of electrons.

Question 4

Which drawing represents the molecular orbital containing the highest energy electrons in the O22- molecular ion in its the ground state?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
A) 
  
B) 
  
C) 
  
D)

Question 5

Which of the following should have the largest dipole moment?

Accepted Answer

A) F2(g) 
B) SO2(g) 
C) RbBr(g) 
D) CH2I2(g) 
A) F2(g) 
B) SO2(g) 
C) RbBr(g) 
D) CH2I2(g)

Question 6

Are the π-bonds in CH3CO2- delocalized or localized?

Accepted Answer

Question 7

Which molecule has a central atom that uses the set of hybrid orbitals shown below to form bonds with the non-central atoms?

Accepted Answer

A) H2Se 
B) CS2 
C) NO2- 
D) ICl2- 
A) H2Se 
B) CS2 
C) NO2- 
D) ICl2-

Question 8

Which drawing represents the molecular orbital containing the highest energy electrons in the H2 molecule in its ground state?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
A) 
  
B) 
  
C) 
  
D)

Question 9

Which has the smallest dipole-dipole forces?

Accepted Answer

A) CH3F  
B) HCl  
C) N2 
D) CO  
A) CH3F  
B) HCl  
C) N2 
D) CO

Question 10

What is the molecular geometry of SeF5-?

Accepted Answer

A) octahedral 
B) seesaw 
C) square pyramidal 
D) trigonal bipyramidal 
A) octahedral 
B) seesaw 
C) square pyramidal 
D) trigonal bipyramidal

Question 11

The polarity of CCl4 is ________.

Accepted Answer

Question 12

What is the geometry around the central atom in the following molecular model of SI6?

Accepted Answer

A) trigonal bipyramidal 
B) octahedral 
C) square pyramidal 
D) square planar 
A) trigonal bipyramidal 
B) octahedral 
C) square pyramidal 
D) square planar

Question 13

Helium can be liquefied when He atoms are attracted to one another by intermolecular ________ forces.

Accepted Answer

dispersion

Question 14

What is the geometry around the central atom in the following molecular model of NO2-?

Accepted Answer

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

Question 15

What are the bond angles in the following molecular model of XeF4?

Accepted Answer

A) some less than 90° and some less than 120° but greater than 90° 
B) 90° 
C) some less than 90° and some less than 180° but greater than 90° 
D) 90° and 180° 
A) some less than 90° and some less than 120° but greater than 90° 
B) 90° 
C) some less than 90° and some less than 180° but greater than 90° 
D) 90° and 180°

Question 16

The following MO diagram is appropriate for Li2 and Be2.Based on this diagram,

Accepted Answer

A) both are stable and diamagnetic. 
B) Li2 is stable and diamagnetic,but Be2 is unstable. 
C) Be2 is stable and diamagnetic,but Li2 is unstable. 
D) Be2 is stable and paramagnetic,but Li2 is unstable. 
A) both are stable and diamagnetic. 
B) Li2 is stable and diamagnetic,but Be2 is unstable. 
C) Be2 is stable and diamagnetic,but Li2 is unstable. 
D) Be2 is stable and paramagnetic,but Li2 is unstable.

Question 17

Identify the set of hybrid orbitals shown below.

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp4 
A) sp 
B) sp2 
C) sp3 
D) sp4

Question 18

Shown below is a model of CBr4 having an orientation in which one or more atoms are hidden from view.What is the indicated bond angle?

Accepted Answer

A) less than 109.5° 
B) 109.5° 
C) less than 120° but greater than 109.5° 
D) 120° 
A) less than 109.5° 
B) 109.5° 
C) less than 120° but greater than 109.5° 
D) 120°

Question 19

Which of the following would be expected to have sp2 hybridization on atom A?

Accepted Answer

A) II 
B) I and III 
C) I,II,and III 
D) I and IV 
A) II 
B) I and III 
C) I,II,and III 
D) I and IV

Question 20

Which compound below could have a zero dipole moment?

Accepted Answer

A) CCl2F2 (tetrahedral) 
B) CuCl2F2 (tetrahedral) 
C) PtCl2F2 (square planar) 
D) SCl2F2 (see-saw) 
A) CCl2F2 (tetrahedral) 
B) CuCl2F2 (tetrahedral) 
C) PtCl2F2 (square planar) 
D) SCl2F2 (see-saw)

Exam 8: Covalent Compounds: Bonding Theories and Molecular Structure

What are the bond angles in the following molecular model of BBr3?

What is the molecular geometry of SbCl3?

Which drawing represents the molecular orbital containing the highest energy electrons in the O22- molecular ion in its the ground state?

Which of the following should have the largest dipole moment?

Are the π-bonds in CH3CO2- delocalized or localized?

Which molecule has a central atom that uses the set of hybrid orbitals shown below to form bonds with the non-central atoms?

Which drawing represents the molecular orbital containing the highest energy electrons in the H2 molecule in its ground state?

Which has the smallest dipole-dipole forces?

What is the molecular geometry of SeF5-?

The polarity of CCl4 is ________.

What is the geometry around the central atom in the following molecular model of SI6?

Helium can be liquefied when He atoms are attracted to one another by intermolecular ________ forces.

What is the geometry around the central atom in the following molecular model of NO2-?

What are the bond angles in the following molecular model of XeF4?

The following MO diagram is appropriate for Li2 and Be2.Based on this diagram,

Identify the set of hybrid orbitals shown below.

Shown below is a model of CBr4 having an orientation in which one or more atoms are hidden from view.What is the indicated bond angle?

Which of the following would be expected to have sp2 hybridization on atom A?

Which compound below could have a zero dipole moment?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

What are the bond angles in the following molecular model of BBr₃?

What is the molecular geometry of SbCl₃?

Which drawing represents the molecular orbital containing the highest energy electrons in the O₂^2- molecular ion in its the ground state?

Are the π-bonds in CH₃CO₂^- delocalized or localized?

Which drawing represents the molecular orbital containing the highest energy electrons in the H₂ molecule in its ground state?

What is the molecular geometry of SeF₅^-?

The polarity of CCl₄ is ________.

What is the geometry around the central atom in the following molecular model of SI₆?

What is the geometry around the central atom in the following molecular model of NO₂^-?

What are the bond angles in the following molecular model of XeF₄?

The following MO diagram is appropriate for Li₂ and Be₂.Based on this diagram,

Shown below is a model of CBr₄ having an orientation in which one or more atoms are hidden from view.What is the indicated bond angle?

Which of the following would be expected to have sp² hybridization on atom A?