Question 1

Which bond is shortest?

Accepted Answer

A)  carbon-oxygen double bond 
B)  carbon-oxygen single bond 
C)  carbon-nitrogen single bond 
D)  carbon-carbon double bond 
E)  carbon-nitrogen double bond 
A)  carbon-oxygen double bond 
B)  carbon-oxygen single bond 
C)  carbon-nitrogen single bond 
D)  carbon-carbon double bond 
E)  carbon-nitrogen double bond

Question 2

Which element is the least electronegative?

Accepted Answer

A)  calcium 
B)  cesium 
C)  iron 
D)  barium 
E)  potassium 
A)  calcium 
B)  cesium 
C)  iron 
D)  barium 
E)  potassium

Question 3

Which of these species does not have resonance structures?

Accepted Answer

A)    
B)  SO2 
C)  H2O 
D)    
E)  O3 
A)    
B)  SO2 
C)  H2O 
D)    
E)  O3

Question 4

Which statement about covalent bonds is false?

Accepted Answer

A)  Covalent bonds allow atoms to achieve a filled outermost electron shell. 
B)  Covalent bonds are unreactive. 
C)  Covalent bonds occur in molecular compounds. 
D)  Covalent bonds involve valence electrons. 
E)  Covalent bonds form between non-metal atoms. 
A)  Covalent bonds allow atoms to achieve a filled outermost electron shell. 
B)  Covalent bonds are unreactive. 
C)  Covalent bonds occur in molecular compounds. 
D)  Covalent bonds involve valence electrons. 
E)  Covalent bonds form between non-metal atoms.

Question 5

In a polar covalent bond, _____________ are _____________ shared.

Accepted Answer

electrons,

Question 6

What is the formal charge on carbon in HCN?

Accepted Answer

A)  -2 
B)  -1 
C)  0 
D)  +1 
E)  +2 
A)  -2 
B)  -1 
C)  0 
D)  +1 
E)  +2

Question 7

Which represents a non-polar covalent bond?

Accepted Answer

A)  H-O 
B)  C-N 
C)  C-C 
D)  Li-F 
E)  S-O 
A)  H-O 
B)  C-N 
C)  C-C 
D)  Li-F 
E)  S-O

Question 8

How many electrons are shown in the correctly drawn Lewis Structure for CH3CH3?

Accepted Answer

A)  8 
B)  10 
C)  14 
D)  18 
E)  34 
A)  8 
B)  10 
C)  14 
D)  18 
E)  34

Question 9

Determine the formula for an alkyne, alkene and alkane, in this order, containing 3 carbons.

Accepted Answer

A)  C3H3 C3H6 C3H4 
B)  C3H6 C3H8 C3H10 
C)  C3H4 C3H8 C3H6 
D)  C3H4 C3H6 C3H8 
E)  C3H6 C3H10 C3H8 
A)  C3H3 C3H6 C3H4 
B)  C3H6 C3H8 C3H10 
C)  C3H4 C3H8 C3H6 
D)  C3H4 C3H6 C3H8 
E)  C3H6 C3H10 C3H8

Question 10

Which molecule contains a double bond?

Accepted Answer

A)  HCN 
B)  H2S 
C)  C2H2 
D)  C2H6 
E)  O2 
A)  HCN 
B)  H2S 
C)  C2H2 
D)  C2H6 
E)  O2

Question 11

What is the formal charge on carbon in CO?

Accepted Answer

A)  -2 
B)  -1 
C)  0 
D)  +1 
E)  +2 
A)  -2 
B)  -1 
C)  0 
D)  +1 
E)  +2

Question 12

Which of these elements cannot exceed the octet rule?

Accepted Answer

A)  Si, P, S, Cl 
B)  B, N, O, F 
C)  O, S, F, Cl 
D)  B, Si, N, P 
E)  All eight elements can exceed the octet rule. 
A)  Si, P, S, Cl 
B)  B, N, O, F 
C)  O, S, F, Cl 
D)  B, Si, N, P 
E)  All eight elements can exceed the octet rule.

Question 13

Which element has five electrons in its Lewis symbol?

Accepted Answer

A)  argon 
B)  boron 
C)  carbon 
D)  phosphorus 
E)  sulfur 
A)  argon 
B)  boron 
C)  carbon 
D)  phosphorus 
E)  sulfur

Question 14

From the data given below, calculate the approximate enthalpy change of reaction for the reaction below.

Accepted Answer

A)  -490 kJ 
B)  -276 kJ 
C)  -138 kJ 
D)  +138 kJ 
E)  +325 kJ 
A)  -490 kJ 
B)  -276 kJ 
C)  -138 kJ 
D)  +138 kJ 
E)  +325 kJ

Question 15

Which molecule does not contain a multiple bond?

Accepted Answer

A)  H2O2 
B)  C2H2 
C)  CH2O 
D)  CO2 
E)  O2 
A)  H2O2 
B)  C2H2 
C)  CH2O 
D)  CO2 
E)  O2

Question 16

Which of these species has one or more resonance structures?

Accepted Answer

A)  H2S 
B)  CCl4 
C)  PCl3 
D)    
E)    
A)  H2S 
B)  CCl4 
C)  PCl3 
D)    
E)

Question 17

Construct correct Lewis dot structures for the three molecules below. Determine which compound(s) exceed the octet rule.

Accepted Answer

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

Question 18

Hydrocarbons with only single bonds are called _____________.

Accepted Answer

The answer of Hydrocarbons with only single bonds are called...

Question 19

Write the correct Lewis dot structure for N2. Which statement correctly describes the structure?

Accepted Answer

A)  The structure contains 1 single bond 5 lone electron pairs. 
B)  The structure contains 1 double bond and 4 lone electron pairs. 
C)  The structure contains 1 double bond and 5 lone electron pairs. 
D)  The structure contains 1 double bond and 6 lone electron pairs. 
E)  The structure contains 1 triple bond and 2 lone electron pairs. 
A)  The structure contains 1 single bond 5 lone electron pairs. 
B)  The structure contains 1 double bond and 4 lone electron pairs. 
C)  The structure contains 1 double bond and 5 lone electron pairs. 
D)  The structure contains 1 double bond and 6 lone electron pairs. 
E)  The structure contains 1 triple bond and 2 lone electron pairs.

Question 20

Which statement about drawing Lewis dot structures is incorrect?

Accepted Answer

A)  The element boron has three electrons in its Lewis symbol. 
B)  One must subtract electrons to form a cation from a neutral atom. 
C)  One must add electrons to form an anion from a neutral atom. 
D)  Not every element obeys the octet rule. 
E)  Second period elements can exceed the octet rule. 
A)  The element boron has three electrons in its Lewis symbol. 
B)  One must subtract electrons to form a cation from a neutral atom. 
C)  One must add electrons to form an anion from a neutral atom. 
D)  Not every element obeys the octet rule. 
E)  Second period elements can exceed the octet rule.

Which bond is shortest?

Which element is the least electronegative?

Which of these species does not have resonance structures?

Which statement about covalent bonds is false?

In a polar covalent bond, _ are _ shared.

What is the formal charge on carbon in HCN?

Which represents a non-polar covalent bond?

How many electrons are shown in the correctly drawn Lewis Structure for CH₃CH₃?

Determine the formula for an alkyne, alkene and alkane, in this order, containing 3 carbons.

Which molecule contains a double bond?

What is the formal charge on carbon in CO?

Which of these elements cannot exceed the octet rule?

Which element has five electrons in its Lewis symbol?

From the data given below, calculate the approximate enthalpy change of reaction for the reaction below.

Which molecule does not contain a multiple bond?

Which of these species has one or more resonance structures?

Construct correct Lewis dot structures for the three molecules below. Determine which compound(s) exceed the octet rule.

Hydrocarbons with only single bonds are called _____________.

Write the correct Lewis dot structure for N₂. Which statement correctly describes the structure?

Which statement about drawing Lewis dot structures is incorrect?

The Nature of Chemistry

Atoms and Elements

Chemical Compounds

Quantities of Reactants and Products

Chemical Reactions

Energy and Chemical Reactions

Electron Configurations and the Periodic Table

Molecular Structure

Gases and the Atmosphere

Liquids, Solids, and Materials

Chemical Kinetics: Rates of Reactions

Chemical Equilibrium

The Chemistry of Solutes and Solutions

Acids and Bases

Additional Aqueous Equilibria

Thermodynamics: Directionality of Chemical Reactions

Electrochemistry and Its Applications

Nuclear Chemistry

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Exam 8: Covalent Bonding

Which bond is shortest?

Which element is the least electronegative?

Which of these species does not have resonance structures?

Which statement about covalent bonds is false?

In a polar covalent bond, _____________ are _____________ shared.

What is the formal charge on carbon in HCN?

Which represents a non-polar covalent bond?

How many electrons are shown in the correctly drawn Lewis Structure for CH3CH3?

Determine the formula for an alkyne, alkene and alkane, in this order, containing 3 carbons.

Which molecule contains a double bond?

What is the formal charge on carbon in CO?

Which of these elements cannot exceed the octet rule?

Which element has five electrons in its Lewis symbol?

From the data given below, calculate the approximate enthalpy change of reaction for the reaction below.

Which molecule does not contain a multiple bond?

Which of these species has one or more resonance structures?

Construct correct Lewis dot structures for the three molecules below. Determine which compound(s) exceed the octet rule.

Hydrocarbons with only single bonds are called _____________.

Write the correct Lewis dot structure for N2. Which statement correctly describes the structure?

Which statement about drawing Lewis dot structures is incorrect?

The Nature of Chemistry

Atoms and Elements

Chemical Compounds

Quantities of Reactants and Products

Chemical Reactions

Energy and Chemical Reactions

Electron Configurations and the Periodic Table

Molecular Structure

Gases and the Atmosphere

Liquids, Solids, and Materials

Chemical Kinetics: Rates of Reactions

Chemical Equilibrium

The Chemistry of Solutes and Solutions

Acids and Bases

Additional Aqueous Equilibria

Thermodynamics: Directionality of Chemical Reactions

Electrochemistry and Its Applications

Nuclear Chemistry

Filters

In a polar covalent bond, _ are _ shared.

How many electrons are shown in the correctly drawn Lewis Structure for CH₃CH₃?

Write the correct Lewis dot structure for N₂. Which statement correctly describes the structure?