Question 1

The Lewis structure for CHCl3 has nine lone electron pairs.

Accepted Answer

A) True 
 B)False

Question 2

Consider the compound crotonaldehyde,whose skeleton is:  
-How many nonbonding electrons appear in the Lewis structure of this molecule?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
E) 10 
A) 2 
B) 4 
C) 6 
D) 8 
E) 10

Question 3

Which of the following species would be expected to have the lowest ionization energy?

Accepted Answer

A) F- 
B) Ne 
C) O2- 
D) Mg2+ 
E) Na+ 
A) F- 
B) Ne 
C) O2- 
D) Mg2+ 
E) Na+

Question 4

Based on electronegativity differences,which of the following is most likely to be ionic?

Accepted Answer

A) CaF2 
B) Br2 
C) BH3 
D) NO 
E) CF4 
A) CaF2 
B) Br2 
C) BH3 
D) NO 
E) CF4

Question 5

The molecular structure of BrF6+ is

Accepted Answer

A) pyramidal 
B) none of these 
C) octahedral 
D) trigonal planar 
E) bent 
A) pyramidal 
B) none of these 
C) octahedral 
D) trigonal planar 
E) bent

Question 6

The electron pair in a C-F bond could be considered

Accepted Answer

A) closer to C because carbon has a larger radius and thus exerts greater control over the shared electron pair 
B) closer to F because fluorine has a higher electronegativity than carbon 
C) closer to C because carbon has a lower electronegativity than fluorine 
D) an inadequate model since the bond is ionic 
E) centrally located directly between the C and F 
A) closer to C because carbon has a larger radius and thus exerts greater control over the shared electron pair 
B) closer to F because fluorine has a higher electronegativity than carbon 
C) closer to C because carbon has a lower electronegativity than fluorine 
D) an inadequate model since the bond is ionic 
E) centrally located directly between the C and F

Question 7

For each of the following compounds:
a)Draw the Lewis structure.
b)Give the shape of the molecule.
c)Indicate the polarity of the molecule.
-CBrI3

Accepted Answer

Part A: @#IMG-DLM& P

Question 8

As the number of bonds between two carbon atoms increases,which one of the following decreases?

Accepted Answer

A) number of electrons between the carbon atoms 
B) bond energy 
C) bond length 
D) all of these 
E) none of these 
A) number of electrons between the carbon atoms 
B) bond energy 
C) bond length 
D) all of these 
E) none of these

Question 9

Which of the following has the smallest radius?

Accepted Answer

A) Br- 
B) S2- 
C) Xe 
D) Ca2+ 
E) Kr 
A) Br- 
B) S2- 
C) Xe 
D) Ca2+ 
E) Kr

Question 10

How many of the following molecules-SF2,SF4,SF6,SiO2-are polar?

Accepted Answer

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

Question 11

Which of the following molecules has a nonlinear structure?

Accepted Answer

A) XeF2 
B) BeCl2 
C) O3 
D) CO2 
E) N2O (central atom is N) 
A) XeF2 
B) BeCl2 
C) O3 
D) CO2 
E) N2O (central atom is N)

Question 12

For the elements Cs,F,and Cl,the order of increasing electronegativity is:

Accepted Answer

A) F < Cl < Cs 
B) Cs < Cl < F 
C) Cl < Cs < F 
D) F < Cs < Cl 
E) none of these 
A) F < Cl < Cs 
B) Cs < Cl < F 
C) Cl < Cs < F 
D) F < Cs < Cl 
E) none of these

Question 13

In the gaseous phase,which of the following diatomic molecules would be the most polar?

Accepted Answer

A) CsF 
B) CsCl 
C) NaCl 
D) NaF 
E) LiF 
A) CsF 
B) CsCl 
C) NaCl 
D) NaF 
E) LiF

Question 14

Select the best Lewis structure for acetone,CH3COCH3.

Accepted Answer

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

Question 15

Which of the following atoms cannot exceed the octet rule in a molecule?

Accepted Answer

A) N 
B) S 
C) P 
D) I 
E) All of the atoms (A-
D) can exceed the octet rule. 
A) N 
B) S 
C) P 
D) I 
E) All of the atoms (A-
D) can exceed the octet rule.

Question 16

Based on electronegativities,which of the following would you expect to be most ionic?

Accepted Answer

A) N2 
B) CaF2 
C) CO2 
D) CH4 
E) CF4 
A) N2 
B) CaF2 
C) CO2 
D) CH4 
E) CF4

Question 17

In the cyanide ion (CN-),the nitrogen has a formal charge of

Accepted Answer

A) -2 
B) -1 
C) 0 
D) 2 
E) More information is needed. 
A) -2 
B) -1 
C) 0 
D) 2 
E) More information is needed.

Question 18

Select the correct molecular structure for the given species from the choices below:
-ClF2+

Accepted Answer

A) linear 
B) trigonal planar 
C) tetrahedral 
D) bent 
E) none of these 
A) linear 
B) trigonal planar 
C) tetrahedral 
D) bent 
E) none of these

Question 19

The __________ of a molecule shows how the valence electrons are arranged among the atoms in the molecule.

Accepted Answer

The answer of The __________ of a molecule shows how...

Question 20

For each of the following compounds:
a)Draw the Lewis structure.
b)Give the shape of the molecule.
c)Indicate the polarity of the molecule.
-ICl4-

Accepted Answer

Part A: @#IMG-DLM& P

Exam 8: Bonding: General Concepts

The Lewis structure for CHCl3 has nine lone electron pairs.

Consider the compound crotonaldehyde,whose skeleton is: -How many nonbonding electrons appear in the Lewis structure of this molecule?

Which of the following species would be expected to have the lowest ionization energy?

Based on electronegativity differences,which of the following is most likely to be ionic?

The molecular structure of BrF6+ is

The electron pair in a C-F bond could be considered

For each of the following compounds: a)Draw the Lewis structure. b)Give the shape of the molecule. c)Indicate the polarity of the molecule. -CBrI3

As the number of bonds between two carbon atoms increases,which one of the following decreases?

Which of the following has the smallest radius?

How many of the following molecules-SF2,SF4,SF6,SiO2-are polar?

Which of the following molecules has a nonlinear structure?

For the elements Cs,F,and Cl,the order of increasing electronegativity is:

In the gaseous phase,which of the following diatomic molecules would be the most polar?

Select the best Lewis structure for acetone,CH3COCH3.

Which of the following atoms cannot exceed the octet rule in a molecule?

Based on electronegativities,which of the following would you expect to be most ionic?

In the cyanide ion (CN-),the nitrogen has a formal charge of

Select the correct molecular structure for the given species from the choices below: -ClF2+

The __________ of a molecule shows how the valence electrons are arranged among the atoms in the molecule.

For each of the following compounds: a)Draw the Lewis structure. b)Give the shape of the molecule. c)Indicate the polarity of the molecule. -ICl4-

Chemical Foundations

Atoms, molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Thermochemistry

Atomic Structure and Periodicity

Covalent Bonding: Orbitals

Liquids and Solids

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex Ion Equilibria

Spontaneity, entropy, and Free Energy

Electrochemistry

The Nucleus: a Chemists View

The Representative Elements

Transition Metals and Coordination Chemistry

Organic and Biological Molecules

Filters

The Lewis structure for CHCl₃ has nine lone electron pairs.

The molecular structure of BrF₆⁺ is

For each of the following compounds: a)Draw the Lewis structure. b)Give the shape of the molecule. c)Indicate the polarity of the molecule. -CBrI₃

How many of the following molecules-SF₂,SF₄,SF₆,SiO₂-are polar?

Select the best Lewis structure for acetone,CH₃COCH₃.

In the cyanide ion (CN^-),the nitrogen has a formal charge of

Select the correct molecular structure for the given species from the choices below: -ClF₂⁺

For each of the following compounds: a)Draw the Lewis structure. b)Give the shape of the molecule. c)Indicate the polarity of the molecule. -ICl₄^-