Question 1

The correctly drawn Lewis dot structure for linear H2CO2 contains _____________ lone electron pairs, _____________ single bonds and _____________ double bonds.

Accepted Answer

Question 2

Select the element that never forms more than one bond in a Lewis dot structure.

Accepted Answer

A)  O 
B)  C 
C)  N 
D)  Al 
E)  H 
A)  O 
B)  C 
C)  N 
D)  Al 
E)  H

Question 3

Which element has four electrons in its Lewis symbol?

Accepted Answer

A)  aluminum 
B)  beryllium 
C)  carbon 
D)  magnesium 
E)  oxygen 
A)  aluminum 
B)  beryllium 
C)  carbon 
D)  magnesium 
E)  oxygen

Question 4

How many resonance forms will ozone, O3, have?

Accepted Answer

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

Question 5

Which bond is strongest?

Accepted Answer

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

Question 6

Which bond is longest?

Accepted Answer

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

Question 7

Write the correct Lewis structure for XeF4. This molecule exceeds the octet rule. Determine the number of bonding electron pairs and lone electron pairs that are present on the central atom.

Accepted Answer

A)  4 bonding pairs and 1 lone pair 
B)  5 bonding pairs and 0 lone pairs 
C)  4 bonding pairs and 2 lone pairs 
D)  5 bonding pairs and 2 lone pairs 
E)  6 bonding pairs and 0 lone pairs 
A)  4 bonding pairs and 1 lone pair 
B)  5 bonding pairs and 0 lone pairs 
C)  4 bonding pairs and 2 lone pairs 
D)  5 bonding pairs and 2 lone pairs 
E)  6 bonding pairs and 0 lone pairs

Question 8

Which element is the most electronegative?

Accepted Answer

A)  sulfur 
B)  iodine 
C)  nitrogen 
D)  aluminum 
E)  carbon 
A)  sulfur 
B)  iodine 
C)  nitrogen 
D)  aluminum 
E)  carbon

Question 9

Which statement about bond energies is false?

Accepted Answer

A)  A carbon-carbon multiple bond requires less energy to break than a carbon-carbon single bond. 
B)  The carbon-carbon bonds in an alkane have very similar bond energies. 
C)  It is assumed that a carbon-hydrogen bond has the same bond energy whether it is found in an alcohol or an alkane. 
D)  The formation of a carbon-oxygen double bond from the unbonded atoms yields more energy than the formation of a carbon-oxygen single bond from the unbonded atoms. 
E)  Bond energy calculations require no knowledge of the bond polarity but they do require knowledge of the bond multiplicity and the average bond energies. 
A)  A carbon-carbon multiple bond requires less energy to break than a carbon-carbon single bond. 
B)  The carbon-carbon bonds in an alkane have very similar bond energies. 
C)  It is assumed that a carbon-hydrogen bond has the same bond energy whether it is found in an alcohol or an alkane. 
D)  The formation of a carbon-oxygen double bond from the unbonded atoms yields more energy than the formation of a carbon-oxygen single bond from the unbonded atoms. 
E)  Bond energy calculations require no knowledge of the bond polarity but they do require knowledge of the bond multiplicity and the average bond energies.

Question 10

Assume all hydrocarbons given are linear. Which compound will contain one double bond?

Accepted Answer

A)  C3H6 
B)  C6H10 
C)  C2H2 
D)  CH4 
E)  C5H12 
A)  C3H6 
B)  C6H10 
C)  C2H2 
D)  CH4 
E)  C5H12

Question 11

Match between columns
                        Premises:  HCN
 CS1U1B17S1U1B0HS1U1B114S1U1B0
 CS1U1B15S1U1B0HS1U1B18S1U1B0
an unequally shared pair of electrons
 has an unpaired electron
 an equally shared pair of electrons
 CS1U1B14S1U1B0HS1U1B110S1U1B0
 sulfur

Accepted Answer

The Answer of  polar compound  and  can is...

Question 12

In organic compounds, cis-trans isomerism is associated with which types of bonds?

Accepted Answer

A)  carbon-carbon triple bonds 
B)  carbon-carbon single bonds 
C)  carbon-carbon double bonds 
D)  carbon-oxygen single bonds 
E)  carbon-oxygen double bonds 
A)  carbon-carbon triple bonds 
B)  carbon-carbon single bonds 
C)  carbon-carbon double bonds 
D)  carbon-oxygen single bonds 
E)  carbon-oxygen double bonds

Question 13

Which statement concerning the interaction between two atoms is incorrect?

Accepted Answer

A)  If two atoms are widely separated, there is very little attraction between them. 
B)  When two atoms are one bond length apart, the electrons on one atom are attracted to the nucleus of the other atom. 
C)  When two atoms have very little separation between them, repulsion occurs. 
D)  A covalent bond occurs when electrons are shared between the bonded atoms. 
E)  As atoms get closer together, their electrons attract each other. 
A)  If two atoms are widely separated, there is very little attraction between them. 
B)  When two atoms are one bond length apart, the electrons on one atom are attracted to the nucleus of the other atom. 
C)  When two atoms have very little separation between them, repulsion occurs. 
D)  A covalent bond occurs when electrons are shared between the bonded atoms. 
E)  As atoms get closer together, their electrons attract each other.

Question 14

Hydrocarbons that contain double bonds are called _____________.

Accepted Answer

The answer of Hydrocarbons that contain double bonds are called...

Question 15

Assume all hydrocarbons given are linear. Which compound will contain one triple bond?

Accepted Answer

A)  C3H6 
B)  C8H18 
C)  C4H8 
D)  CH4 
E)  C7H12 
A)  C3H6 
B)  C8H18 
C)  C4H8 
D)  CH4 
E)  C7H12

Question 16

Which molecule does not contain a double bond?

Accepted Answer

A)  CO2 
B)  CH2O 
C)  O2 
D)  HCOOH 
E)  HCN 
A)  CO2 
B)  CH2O 
C)  O2 
D)  HCOOH 
E)  HCN

Question 17

Write the correct Lewis structure for AsCl5. This molecule exceeds the octet rule. Determine the number of bonding electron pairs and lone electron pairs that are present on the central atom.

Accepted Answer

A)  5 bonding pairs and 0 lone pairs 
B)  5 bonding pairs and 1 lone pair 
C)  5 bonding pairs and 2 lone pairs 
D)  6 bonding pairs and 0 lone pairs 
E)  6 bonding pairs and 1 lone pair 
A)  5 bonding pairs and 0 lone pairs 
B)  5 bonding pairs and 1 lone pair 
C)  5 bonding pairs and 2 lone pairs 
D)  6 bonding pairs and 0 lone pairs 
E)  6 bonding pairs and 1 lone pair

Question 18

Which element is the most electronegative?

Accepted Answer

A)  phosphorus 
B)  silicon 
C)  carbon 
D)  nitrogen 
E)  oxygen 
A)  phosphorus 
B)  silicon 
C)  carbon 
D)  nitrogen 
E)  oxygen

Question 19

Oxygen atoms contribute _____________ electrons to a Lewis Dot structure.

Accepted Answer

The answer of Oxygen atoms contribute _____________ electrons to a...

Question 20

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

Accepted Answer

A)  N-C < N-Si < N-I < N-H 
B)  N-H < N-C < N-Si < N-I 
C)  N-I < N-Si < N-H < N-C 
D)  N-Si < N-I < N-C < NH 
E)  N-H < N-Si < N-C < N-I 
A)  N-C < N-Si < N-I < N-H 
B)  N-H < N-C < N-Si < N-I 
C)  N-I < N-Si < N-H < N-C 
D)  N-Si < N-I < N-C < NH 
E)  N-H < N-Si < N-C < N-I

The correctly drawn Lewis dot structure for linear H₂CO₂ contains _______ lone electron pairs, _ single bonds and _______ double bonds.

Select the element that never forms more than one bond in a Lewis dot structure.

Which element has four electrons in its Lewis symbol?

How many resonance forms will ozone, O₃, have?

Which bond is strongest?

Which bond is longest?

Write the correct Lewis structure for XeF₄. This molecule exceeds the octet rule. Determine the number of bonding electron pairs and lone electron pairs that are present on the central atom.

Which element is the most electronegative?

Which statement about bond energies is false?

Assume all hydrocarbons given are linear. Which compound will contain one double bond?

In organic compounds, cis-trans isomerism is associated with which types of bonds?

Which statement concerning the interaction between two atoms is incorrect?

Hydrocarbons that contain double bonds are called _____________.

Assume all hydrocarbons given are linear. Which compound will contain one triple bond?

Which molecule does not contain a double bond?

Write the correct Lewis structure for AsCl₅. This molecule exceeds the octet rule. Determine the number of bonding electron pairs and lone electron pairs that are present on the central atom.

Which element is the most electronegative?

Oxygen atoms contribute _____________ electrons to a Lewis Dot structure.

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

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

The correctly drawn Lewis dot structure for linear H2CO2 contains _____________ lone electron pairs, _____________ single bonds and _____________ double bonds.

Select the element that never forms more than one bond in a Lewis dot structure.

Which element has four electrons in its Lewis symbol?

How many resonance forms will ozone, O3, have?

Which bond is strongest?

Which bond is longest?

Write the correct Lewis structure for XeF4. This molecule exceeds the octet rule. Determine the number of bonding electron pairs and lone electron pairs that are present on the central atom.

Which element is the most electronegative?

Which statement about bond energies is false?

Assume all hydrocarbons given are linear. Which compound will contain one double bond?

In organic compounds, cis-trans isomerism is associated with which types of bonds?

Which statement concerning the interaction between two atoms is incorrect?

Hydrocarbons that contain double bonds are called _____________.

Assume all hydrocarbons given are linear. Which compound will contain one triple bond?

Which molecule does not contain a double bond?

Write the correct Lewis structure for AsCl5. This molecule exceeds the octet rule. Determine the number of bonding electron pairs and lone electron pairs that are present on the central atom.

Which element is the most electronegative?

Oxygen atoms contribute _____________ electrons to a Lewis Dot structure.

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

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

The correctly drawn Lewis dot structure for linear H₂CO₂ contains _______ lone electron pairs, _ single bonds and _______ double bonds.

How many resonance forms will ozone, O₃, have?

Write the correct Lewis structure for XeF₄. This molecule exceeds the octet rule. Determine the number of bonding electron pairs and lone electron pairs that are present on the central atom.

Write the correct Lewis structure for AsCl₅. This molecule exceeds the octet rule. Determine the number of bonding electron pairs and lone electron pairs that are present on the central atom.