Question 1

How many bonds does a carbon atom typically form?

Accepted Answer

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

Question 2

Which of the following statements is generally true about electronegativity?

Accepted Answer

A)  Electronegativity decreases as we move left to right and decreases as we move top to bottom. 
B)  Electronegativity decreases as we move left to right and increases as we move top to bottom. 
C)  Electronegativity increases as we move left to right and decreases as we move top to bottom. 
D)  Electronegativity increases as we move left to right and increases as we move top to bottom. 
A)  Electronegativity decreases as we move left to right and decreases as we move top to bottom. 
B)  Electronegativity decreases as we move left to right and increases as we move top to bottom. 
C)  Electronegativity increases as we move left to right and decreases as we move top to bottom. 
D)  Electronegativity increases as we move left to right and increases as we move top to bottom.

Question 3

Which of the following is true of the individual resonance structures which contribute to a resonance hybrid?

Accepted Answer

A)  Each resonance structure actually exists. 
B)  Each resonance structure is less stable than is the resonance hybrid. 
C)  In going from one resonance structure to another the electrons move from one location to another. 
D)  None of the above is true. 
A)  Each resonance structure actually exists. 
B)  Each resonance structure is less stable than is the resonance hybrid. 
C)  In going from one resonance structure to another the electrons move from one location to another. 
D)  None of the above is true.

Question 4

What bond angle is most closely associated with a tetrahedral distribution of electron density?

Accepted Answer

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

Question 5

A student is attempting to draw several resonance structures for a species. Which of the following is allowed?

Accepted Answer

A)  Change the connectivity of the nuclei. 
B)  Move electrons from one location to another. 
C)  both a and b 
D)  neither a nor b 
A)  Change the connectivity of the nuclei. 
B)  Move electrons from one location to another. 
C)  both a and b 
D)  neither a nor b

Question 6

Which of the following is true of polyatomic ions?

Accepted Answer

A)  All are anions. 
B)  All are cations. 
C)  The vast majority are anions. 
D)  The vast majority are cations. 
A)  All are anions. 
B)  All are cations. 
C)  The vast majority are anions. 
D)  The vast majority are cations.

Question 7

Which is most likely true for an atom with one valence electron?

Accepted Answer

A)  It will gain one electron. 
B)  It will gain two electrons. 
C)  It will lose one electron. 
D)  It will lose two electrons. 
A)  It will gain one electron. 
B)  It will gain two electrons. 
C)  It will lose one electron. 
D)  It will lose two electrons.

Question 8

Which of the following elements is most likely to lose electrons to become a cation?

Accepted Answer

A)  Ar 
B)  C 
C)  Cl 
D)  Fe 
A)  Ar 
B)  C 
C)  Cl 
D)  Fe

Question 9

Which of the following is the stannous ion?

Accepted Answer

A)  Sn+ 
B)  Sn2+ 
C)  Sn3+ 
D)  Sn4+ 
A)  Sn+ 
B)  Sn2+ 
C)  Sn3+ 
D)  Sn4+

Question 10

Which of the following describes how a double bond is treated in the VSEPR model?

Accepted Answer

A)  as two single bonds 
B)  as two nonbonding pairs 
C)  as a single region of electron density 
D)  none of the these 
A)  as two single bonds 
B)  as two nonbonding pairs 
C)  as a single region of electron density 
D)  none of the these

Question 11

Ethylene has the formula C2H4. Which of the following is a correct description of ethylene?

Accepted Answer

A)  Ethylene has only single bonds. 
B)  Ethylene has one double bond. 
C)  Ethylene has one triple bond. 
D)  None of these is correct. 
A)  Ethylene has only single bonds. 
B)  Ethylene has one double bond. 
C)  Ethylene has one triple bond. 
D)  None of these is correct.

Question 12

Which of the following elements is most likely to gain electrons to become an anion?

Accepted Answer

A)  Ar 
B)  C 
C)  Cl 
D)  Fe 
A)  Ar 
B)  C 
C)  Cl 
D)  Fe

Question 13

The tin compound used to strengthen teeth has the formula SnF2. Which of the following is the common name for this compound?

Accepted Answer

A)  stannic fluoride 
B)  stannous fluoride 
C)  tin fluoride 
D)  tin(II) fluorine 
A)  stannic fluoride 
B)  stannous fluoride 
C)  tin fluoride 
D)  tin(II) fluorine

Question 14

The tin compound used to strengthen teeth has the formula SnF2. Which of the following is the correct systematic name for this compound?

Accepted Answer

A)  stannic fluoride 
B)  stannous fluoride 
C)  tin fluoride 
D)  tin(II) fluoride 
A)  stannic fluoride 
B)  stannous fluoride 
C)  tin fluoride 
D)  tin(II) fluoride

Question 15

The following represents carbonic acid, an important part of the buffer system in blood.  
-How many total valence electrons were used in constructing this structure?

Accepted Answer

A)  24 
B)  12 
C)  17 
D)  22 
E)  none of these 
A)  24 
B)  12 
C)  17 
D)  22 
E)  none of these

Question 16

In which of the following cases is a polar covalent bond formed?

Accepted Answer

A)  when an electron is transferred from one atom to another 
B)  when the electrons of a bond are shared equally by the two atoms 
C)  when the electrons of a bond are shared unequally by the two atoms 
D)  when a metallic element forms a bond with a nonmetallic element 
A)  when an electron is transferred from one atom to another 
B)  when the electrons of a bond are shared equally by the two atoms 
C)  when the electrons of a bond are shared unequally by the two atoms 
D)  when a metallic element forms a bond with a nonmetallic element

Question 17

Which of the following is true in the carbonate ion, CO32-?

Accepted Answer

A)  All of the carbon to oxygen bonds are equivalent. 
B)  The carbon atom does not have an octet. 
C)  The carbon atoms form two single bonds and one double bond. 
D)  The electrons are constantly moving from one bond location to another. 
A)  All of the carbon to oxygen bonds are equivalent. 
B)  The carbon atom does not have an octet. 
C)  The carbon atoms form two single bonds and one double bond. 
D)  The electrons are constantly moving from one bond location to another.

Question 18

Which of the following bonds is the most polar?

Accepted Answer

A)  C-H 
B)  C-N 
C)  C-O 
D)  C-F 
A)  C-H 
B)  C-N 
C)  C-O 
D)  C-F

Question 19

The following represents carbonic acid, an important part of the buffer system in blood.  
-How many single covalent bonds are represented in this structure?

Accepted Answer

A)  6 
B)  5 
C)  4 
D)  3 
A)  6 
B)  5 
C)  4 
D)  3

Question 20

In which of the following molecules does the carbon atom have a nearly trigonal planar distribution of electron density?

Accepted Answer

A)  C2H2 
B)  C2H4 
C)  C2H6 
D)  none of these 
A)  C2H2 
B)  C2H4 
C)  C2H6 
D)  none of these

Exam 3: Chemical Bonds

How many bonds does a carbon atom typically form?

Which of the following statements is generally true about electronegativity?

Which of the following is true of the individual resonance structures which contribute to a resonance hybrid?

What bond angle is most closely associated with a tetrahedral distribution of electron density?

A student is attempting to draw several resonance structures for a species. Which of the following is allowed?

Which of the following is true of polyatomic ions?

Which is most likely true for an atom with one valence electron?

Which of the following elements is most likely to lose electrons to become a cation?

Which of the following is the stannous ion?

Which of the following describes how a double bond is treated in the VSEPR model?

Ethylene has the formula C2H4. Which of the following is a correct description of ethylene?

Which of the following elements is most likely to gain electrons to become an anion?

The tin compound used to strengthen teeth has the formula SnF2. Which of the following is the common name for this compound?

The tin compound used to strengthen teeth has the formula SnF2. Which of the following is the correct systematic name for this compound?

The following represents carbonic acid, an important part of the buffer system in blood. -How many total valence electrons were used in constructing this structure?

In which of the following cases is a polar covalent bond formed?

Which of the following is true in the carbonate ion, CO32-?

Which of the following bonds is the most polar?

The following represents carbonic acid, an important part of the buffer system in blood. -How many single covalent bonds are represented in this structure?

In which of the following molecules does the carbon atom have a nearly trigonal planar distribution of electron density?

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Filters

Ethylene has the formula C₂H₄. Which of the following is a correct description of ethylene?

The tin compound used to strengthen teeth has the formula SnF₂. Which of the following is the common name for this compound?

The tin compound used to strengthen teeth has the formula SnF₂. Which of the following is the correct systematic name for this compound?

Which of the following is true in the carbonate ion, CO₃^2-?