Question 1

What is the molecular geometry of TeBr4?

Accepted Answer

A) seesaw 
B) square planar 
C) square pyramidal 
D) tetrahedral 
A) seesaw 
B) square planar 
C) square pyramidal 
D) tetrahedral

Question 2

Which of the following best describes ICl2-? It has a molecular geometry that is

Accepted Answer

A) linear with no lone pairs on the I atom. 
B) linear with lone pairs on the I atom. 
C) nonlinear with no lone pairs on the I atom. 
D) nonlinear with lone pairs on the I atom. 
A) linear with no lone pairs on the I atom. 
B) linear with lone pairs on the I atom. 
C) nonlinear with no lone pairs on the I atom. 
D) nonlinear with lone pairs on the I atom.

Question 3

Which is expected to have the largest dispersion forces?

Accepted Answer

A) C2H4 
B) C18H36 
C) NBr3 
D) Ba 
A) C2H4 
B) C18H36 
C) NBr3 
D) Ba

Question 4

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 5

Which drawing best represents hydrogen bonding in methylamine,CH3NH2?

Accepted Answer

A) drawing (1) 
B) drawing (2) 
C) drawing (3) 
D) drawing (4) 
A) drawing (1) 
B) drawing (2) 
C) drawing (3) 
D) drawing (4)

Question 6

What are the bond angles in the following molecular model of BrF5?

Accepted Answer

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

Question 7

The carbon-carbon bond in C2H2 contains ________ σ and ________ π bonds.

Accepted Answer

Question 8

The hybrid orbital used by nitrogen to overlap with the 1s orbital of hydrogen in CH3NH2 is ________.

Accepted Answer

Question 9

What is the geometry around the central atom in the following molecular model of SO32-?

Accepted Answer

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

Question 10

The number of sp2 hybrid orbitals on the carbon atom in CO32- is

Accepted Answer

A) one. 
B) two. 
C) three. 
D) four. 
A) one. 
B) two. 
C) three. 
D) four.

Question 11

Shown below is a model of SiH4 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 12

A molecular model of SO42- is shown below.Based on the best Lewis electron-dot structure for SO42- and formal charge considerations,what is the predicted S-O bond order for each S-O bond?

Accepted Answer

A) 1 
B) 1.33 
C) 1.5 
D) 2 
A) 1 
B) 1.33 
C) 1.5 
D) 2

Question 13

What is the geometry around the central atom in the following molecular model of PCl6-?

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 14

What is geometry around the nitrogen atom?

Accepted Answer

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

Question 15

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 nitrogen atom 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 16

Which of the following molecules has polar bonds but has no net dipole?

Accepted Answer

A) NH3 
B) CCl4 
C) CHCl3 
D) CH4 
A) NH3 
B) CCl4 
C) CHCl3 
D) CH4

Question 17

Which has the smallest dipole-dipole forces?

Accepted Answer

A) CH3Cl 
B) KCN 
C) I2 
D) H2S 
A) CH3Cl 
B) KCN 
C) I2 
D) H2S

Question 18

What is the bond angle in the following molecular model of NH2-?

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

The SO3 molecule can be described as having 3 S-O σ bonds and π molecular orbitals containing

Accepted Answer

A) 2 electrons. 
B) 4 electrons. 
C) 6 electrons. 
D) 8 electrons. 
A) 2 electrons. 
B) 4 electrons. 
C) 6 electrons. 
D) 8 electrons.

Question 20

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 O1 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.

Exam 8: Covalent Compounds: Bonding Theories and Molecular Structure

What is the molecular geometry of TeBr4?

Which of the following best describes ICl2-? It has a molecular geometry that is

Which is expected to have the largest dispersion forces?

Identify the set of hybrid orbitals shown below.

Which drawing best represents hydrogen bonding in methylamine,CH3NH2?

What are the bond angles in the following molecular model of BrF5?

The carbon-carbon bond in C2H2 contains ________ σ and ________ π bonds.

The hybrid orbital used by nitrogen to overlap with the 1s orbital of hydrogen in CH3NH2 is ________.

What is the geometry around the central atom in the following molecular model of SO32-?

The number of sp2 hybrid orbitals on the carbon atom in CO32- is

Shown below is a model of SiH4 having an orientation in which one or more atoms are hidden from view.What is the indicated bond angle?

A molecular model of SO42- is shown below.Based on the best Lewis electron-dot structure for SO42- and formal charge considerations,what is the predicted S-O bond order for each S-O bond?

What is the geometry around the central atom in the following molecular model of PCl6-?

What is geometry around the nitrogen atom?

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 nitrogen atom needs

Which of the following molecules has polar bonds but has no net dipole?

Which has the smallest dipole-dipole forces?

What is the bond angle in the following molecular model of NH2-?

The SO3 molecule can be described as having 3 S-O σ bonds and π molecular orbitals containing

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Filters

What is the molecular geometry of TeBr₄?

Which of the following best describes ICl₂^-? It has a molecular geometry that is

Which drawing best represents hydrogen bonding in methylamine,CH₃NH₂?

What are the bond angles in the following molecular model of BrF₅?

The carbon-carbon bond in C₂H₂ contains σ and π bonds.

The hybrid orbital used by nitrogen to overlap with the 1s orbital of hydrogen in CH₃NH₂ is ________.

What is the geometry around the central atom in the following molecular model of SO₃^2-?

The number of sp² hybrid orbitals on the carbon atom in CO₃^2- is

Shown below is a model of SiH₄ having an orientation in which one or more atoms are hidden from view.What is the indicated bond angle?

A molecular model of SO₄^2- is shown below.Based on the best Lewis electron-dot structure for SO₄^2- and formal charge considerations,what is the predicted S-O bond order for each S-O bond?

What is the geometry around the central atom in the following molecular model of PCl₆^-?

What is the bond angle in the following molecular model of NH₂^-?

The SO₃ molecule can be described as having 3 S-O σ bonds and π molecular orbitals containing