Question 1

Which bond is longest?

Accepted Answer

A)  C-O 
B)  C-I 
C)  C-Br 
D)  C-C 
E)  C-N 
A)  C-O 
B)  C-I 
C)  C-Br 
D)  C-C 
E)  C-N B

Question 2

The ____________ of an element is its ability to pull electrons towards itself when participating in a covalent bond.

Accepted Answer

electronegativity

Question 3

Write the correct Lewis dot structure for CCl2O. Which statement correctly describes the structure?

Accepted Answer

A)  The structure contains 3 single bonds, 1 double bond, and 2 lone electron pairs. 
B)  The structure contains 3 single bonds, 1 triple bond, and 8 lone electron pairs. 
C)  The structure contains 2 single bonds, 1 double bond, and 2 lone electron pairs. 
D)  The structure contains 2 single bonds, 1 double bond and 8 lone electron pairs. 
E)  The structure contains 1 single bond, 1 triple bond, and 2 lone electron pairs. 
A)  The structure contains 3 single bonds, 1 double bond, and 2 lone electron pairs. 
B)  The structure contains 3 single bonds, 1 triple bond, and 8 lone electron pairs. 
C)  The structure contains 2 single bonds, 1 double bond, and 2 lone electron pairs. 
D)  The structure contains 2 single bonds, 1 double bond and 8 lone electron pairs. 
E)  The structure contains 1 single bond, 1 triple bond, and 2 lone electron pairs. D

Question 4

How many electrons will be in the correctly drawn Lewis Structure for CCl4?

Accepted Answer

A)  32 
B)  74 
C)  35 
D)  8 
E)  11 
A)  32 
B)  74 
C)  35 
D)  8 
E)  11

Question 5

Write the singly bonded Lewis dot structure for BF3. Which statement best describes this structure?

Accepted Answer

A)  The octet rule is obeyed for all atoms. 
B)  At least one atom has less than an octet of electrons. 
C)  There is a lone pair of electrons on the boron atom. 
D)  The boron atom has a formal charge of +1. 
E)  At least one atom exceeds the octet rule. 
A)  The octet rule is obeyed for all atoms. 
B)  At least one atom has less than an octet of electrons. 
C)  There is a lone pair of electrons on the boron atom. 
D)  The boron atom has a formal charge of +1. 
E)  At least one atom exceeds the octet rule.

Question 6

Write the correct Lewis dot structures for the compounds given below. Arrange them in order of shortest to longest bond lengths. Consider only the carbon-carbon and carbon-oxygen bonds.

Accepted Answer

A)  C2H6 2H4 2H2 2H2 2H4 2H6 
C)  C2H2 2H4 2H6 2H2 2H4 2H6 
E)  CO 2H6 2H4 2H2 
A)  C2H6 2H4 2H2 2H2 2H4 2H6 
C)  C2H2 2H4 2H6 2H2 2H4 2H6 
E)  CO 2H6 2H4 2H2

Question 7

List these compounds in order of decreasing number of valence electrons: CO2, CH3Cl, HCN.

Accepted Answer

A)  CH3Cl, HCN, CO2 
B)  CO2, HCN, CH3Cl 
C)  CH3Cl, CO2, HCN 
D)  CO2, CH3Cl, HCN 
E)  HCN, CO2, CH3Cl 
A)  CH3Cl, HCN, CO2 
B)  CO2, HCN, CH3Cl 
C)  CH3Cl, CO2, HCN 
D)  CO2, CH3Cl, HCN 
E)  HCN, CO2, CH3Cl

Question 8

Which statement properly describes the formal charges on the atoms in   ?

Accepted Answer

A)  -2 on oxygen, +5 on phosphorus 
B)  -1 on oxygen, +4 on phosphorus 
C)  -1 on oxygen, +1 on phosphorus 
D)  +1 on oxygen, -1 on phosphorus 
E)  +1 on oxygen, -3 on phosphorus 
A)  -2 on oxygen, +5 on phosphorus 
B)  -1 on oxygen, +4 on phosphorus 
C)  -1 on oxygen, +1 on phosphorus 
D)  +1 on oxygen, -1 on phosphorus 
E)  +1 on oxygen, -3 on phosphorus

Question 9

Predict qualitatively the relative bond lengths of the four single bonds given below and arrange them from shortest to longest:

Accepted Answer

A)  C-C < N-N < O-O < F-F 
B)  N-N < O-O < F-F < C-C 
C)  F-F < O-O < N-N < C-C 
D)  O-O < N-N < F-F < C-C 
E)  C-C < F-F < N-N < O-O 
A)  C-C < N-N < O-O < F-F 
B)  N-N < O-O < F-F < C-C 
C)  F-F < O-O < N-N < C-C 
D)  O-O < N-N < F-F < C-C 
E)  C-C < F-F < N-N < O-O

Question 10

Benzene is an example of a resonance hybrid because it contains _____________ electrons.

Accepted Answer

The answer of Benzene is an example of a resonance...

Question 11

How many electrons will be in the correctly drawn Lewis Structure for   ?

Accepted Answer

A)  20 
B)  22 
C)  24 
D)  26 
E)  30 
A)  20 
B)  22 
C)  24 
D)  26 
E)  30

Question 12

What is the formal charge on sulfur in SO2?

Accepted Answer

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

Question 13

Which statement about cis and trans isomers is false? The cis- and trans- isomers of a compound:

Accepted Answer

A)  Have the same chemical formulas 
B)  Have the same molecular weights. 
C)  Occur in compounds containing triple bonds. 
D)  Have different boiling points. 
E)  Have different melting points. 
A)  Have the same chemical formulas 
B)  Have the same molecular weights. 
C)  Occur in compounds containing triple bonds. 
D)  Have different boiling points. 
E)  Have different melting points.

Question 14

Assume all hydrocarbons given are linear. Which compound will contain no multiple bonds?

Accepted Answer

A)  C2H4 
B)  C3H4 
C)  C6H14 
D)  C8H16 
E)  C9H18 
A)  C2H4 
B)  C3H4 
C)  C6H14 
D)  C8H16 
E)  C9H18

Question 15

Which of the following compound can exhibit cis-trans isomerism?

Accepted Answer

A)  CH2=CH2 
B)  CH3CH3 
C)  H2C=O 
D)  ClHC=CHCl 
E)  Cl2C=CH2 
A)  CH2=CH2 
B)  CH3CH3 
C)  H2C=O 
D)  ClHC=CHCl 
E)  Cl2C=CH2

Question 16

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

Accepted Answer

A)  -806 kJ 
B)  -98 kJ 
C)  98 kJ 
D)  120 kJ 
E)  806 kJ 
A)  -806 kJ 
B)  -98 kJ 
C)  98 kJ 
D)  120 kJ 
E)  806 kJ

Question 17

Which bond is least polar?

Accepted Answer

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

Question 18

Determine the number of electrons required by these four elements, in the order listed, to achieve an octet of electrons.

Accepted Answer

A)  1 3 2 4 
B)  3 4 2 2 
C)  3 2 4 1 
D)  4 3 5 2 
E)  5 6 4 7 
A)  1 3 2 4 
B)  3 4 2 2 
C)  3 2 4 1 
D)  4 3 5 2 
E)  5 6 4 7

Question 19

Write the correct Lewis dot structure for O2. Which statement correctly describes the structure of the molecule?

Accepted Answer

A)  There is one double bond and four lone electron pairs. 
B)  There is one double bond and six lone electron pairs. 
C)  There is one single bond and four lone electron pairs. 
D)  There is one single bond and six lone electron pairs. 
E)  There is one single bond, one double bond, and six lone electron pairs. 
A)  There is one double bond and four lone electron pairs. 
B)  There is one double bond and six lone electron pairs. 
C)  There is one single bond and four lone electron pairs. 
D)  There is one single bond and six lone electron pairs. 
E)  There is one single bond, one double bond, and six lone electron pairs.

Question 20

Which molecule contains a triple bond?

Accepted Answer

A)  C2H4 
B)  CCl4 
C)  H2O 
D)  N2 
E)  O2 
A)  C2H4 
B)  CCl4 
C)  H2O 
D)  N2 
E)  O2

Which bond is longest?

The ____________ of an element is its ability to pull electrons towards itself when participating in a covalent bond.

Write the correct Lewis dot structure for CCl₂O. Which statement correctly describes the structure?

How many electrons will be in the correctly drawn Lewis Structure for CCl₄?

Write the singly bonded Lewis dot structure for BF₃. Which statement best describes this structure?

Write the correct Lewis dot structures for the compounds given below. Arrange them in order of shortest to longest bond lengths. Consider only the carbon-carbon and carbon-oxygen bonds.

List these compounds in order of decreasing number of valence electrons: CO₂, CH₃Cl, HCN.

Which statement properly describes the formal charges on the atoms in ?

Predict qualitatively the relative bond lengths of the four single bonds given below and arrange them from shortest to longest:

Benzene is an example of a resonance hybrid because it contains _____________ electrons.

How many electrons will be in the correctly drawn Lewis Structure for ?

What is the formal charge on sulfur in SO₂?

Which statement about cis and trans isomers is false? The cis- and trans- isomers of a compound:

Assume all hydrocarbons given are linear. Which compound will contain no multiple bonds?

Which of the following compound can exhibit cis-trans isomerism?

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

Which bond is least polar?

Determine the number of electrons required by these four elements, in the order listed, to achieve an octet of electrons.

Write the correct Lewis dot structure for O₂. Which statement correctly describes the structure of the molecule?

Which molecule contains a triple bond?

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

Exam 8: Covalent Bonding

Which bond is longest?

The ____________ of an element is its ability to pull electrons towards itself when participating in a covalent bond.

Write the correct Lewis dot structure for CCl2O. Which statement correctly describes the structure?

How many electrons will be in the correctly drawn Lewis Structure for CCl4?

Write the singly bonded Lewis dot structure for BF3. Which statement best describes this structure?

Write the correct Lewis dot structures for the compounds given below. Arrange them in order of shortest to longest bond lengths. Consider only the carbon-carbon and carbon-oxygen bonds.

List these compounds in order of decreasing number of valence electrons: CO2, CH3Cl, HCN.

Which statement properly describes the formal charges on the atoms in ?

Predict qualitatively the relative bond lengths of the four single bonds given below and arrange them from shortest to longest:

Benzene is an example of a resonance hybrid because it contains _____________ electrons.

How many electrons will be in the correctly drawn Lewis Structure for ?

What is the formal charge on sulfur in SO2?

Which statement about cis and trans isomers is false? The cis- and trans- isomers of a compound:

Assume all hydrocarbons given are linear. Which compound will contain no multiple bonds?

Which of the following compound can exhibit cis-trans isomerism?

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

Which bond is least polar?

Determine the number of electrons required by these four elements, in the order listed, to achieve an octet of electrons.

Write the correct Lewis dot structure for O2. Which statement correctly describes the structure of the molecule?

Which molecule contains a triple bond?

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

Write the correct Lewis dot structure for CCl₂O. Which statement correctly describes the structure?

How many electrons will be in the correctly drawn Lewis Structure for CCl₄?

Write the singly bonded Lewis dot structure for BF₃. Which statement best describes this structure?

List these compounds in order of decreasing number of valence electrons: CO₂, CH₃Cl, HCN.

What is the formal charge on sulfur in SO₂?

Write the correct Lewis dot structure for O₂. Which statement correctly describes the structure of the molecule?