Question 1

If a molecule has a positive and negative end, the molecule is said to have a(n) ________ moment.

Accepted Answer

The answer of If a molecule has a positive and...

Question 2

What is the formal charge on each atom in dichloromethane, CH2Cl2?

Accepted Answer

A)  C atom = 0, each H atom = 0, and each Cl atom = 0 
B)  C atom = -2, each H atom = +1, and two Cl atoms = 0 
C)  C atom = +4, each H = -1, and each Cl atom = -1 
D)  C atom = +4, each H = +1, and each Cl atom = -1 
E)  C atom = -4, each H = +1, and each Cl atom = +1 
A)  C atom = 0, each H atom = 0, and each Cl atom = 0 
B)  C atom = -2, each H atom = +1, and two Cl atoms = 0 
C)  C atom = +4, each H = -1, and each Cl atom = -1 
D)  C atom = +4, each H = +1, and each Cl atom = -1 
E)  C atom = -4, each H = +1, and each Cl atom = +1

Question 3

What is the electron-pair geometry around an atom in a molecule or ion which is surrounded by two lone pairs of electrons and three single bonds.

Accepted Answer

A)  trigonal bipyramidal 
B)  see-saw or distorted tetrahedron 
C)  T-shaped 
D)  linear 
E)  trigonal planar 
A)  trigonal bipyramidal 
B)  see-saw or distorted tetrahedron 
C)  T-shaped 
D)  linear 
E)  trigonal planar

Question 4

Which of the following is the correct Lewis dash formula for carbon diselenide?

Accepted Answer

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

Question 5

Which of the following molecules or ions are likely to be free radicals: N2O, NO, and NO2?

Accepted Answer

A)  N2O only 
B)  NO only 
C)  NO2 only 
D)  N2O and NO 
E)  NO and NO2 
A)  N2O only 
B)  NO only 
C)  NO2 only 
D)  N2O and NO 
E)  NO and NO2

Question 6

Rank the following covalent bonds in order of decreasing polarity: 
C-H, N-H, O-H, and F-H.

Accepted Answer

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

Question 7

Which is the best Lewis structure of CH2FCO2H (connectivity correct as given)?

Accepted Answer

A)    
B)    
C)    
D)    
E)  none of these is acceptable 
A)    
B)    
C)    
D)    
E)  none of these is acceptable

Question 8

Which of the following is not a valid resonance structure for N3-?

Accepted Answer

A)    
B)    
C)    
D)    
E)  all are correct 
A)    
B)    
C)    
D)    
E)  all are correct

Question 9

Which of the following are possible Lewis structures for a molecule with the formula C2H6O?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  2 and 3 
E)  1, 2, and 3 
A)  1 
B)  2 
C)  3 
D)  2 and 3 
E)  1, 2, and 3

Question 10

The nitrogen atom in the cyanide ion, CN-, is surrounded by:

Accepted Answer

A)  one single bond and three lone pairs of electrons. 
B)  one double bond and one lone pair of electrons. 
C)  one double bond and two lone pairs of electrons. 
D)  one triple bond and one lone pair of electrons. 
E)  one triple bond and no lone pairs of electrons. 
A)  one single bond and three lone pairs of electrons. 
B)  one double bond and one lone pair of electrons. 
C)  one double bond and two lone pairs of electrons. 
D)  one triple bond and one lone pair of electrons. 
E)  one triple bond and no lone pairs of electrons.

Question 11

When both of the electrons in a molecular bond originate from the same atom, the bond is called a(n)

Accepted Answer

A)  sigma bond. 
B)  coordinate covalent bond. 
C)  pi bond. 
D)  metallic bond. 
E)  ionic bond. 
A)  sigma bond. 
B)  coordinate covalent bond. 
C)  pi bond. 
D)  metallic bond. 
E)  ionic bond.

Question 12

What is the O−C−N bond angle in OCN-?

Accepted Answer

A)  90° 
B)  107° 
C)  109.5° 
D)  120° 
E)  180° 
A)  90° 
B)  107° 
C)  109.5° 
D)  120° 
E)  180°

Question 13

What is the molecular geometry around the nitrogen atom as per the valence shell electron-pair repulsion (VSEPR) theory?? ​ 
  ​

Accepted Answer

A)  Trigonal pyramidal 
B)  Bent 
C)  Tetrahedral 
D)  See-saw or distorted tetrahedral 
E)  Trigonal planar 
A)  Trigonal pyramidal 
B)  Bent 
C)  Tetrahedral 
D)  See-saw or distorted tetrahedral 
E)  Trigonal planar

If a molecule has a positive and negative end, the molecule is said to have a(n) ________ moment.

What is the formal charge on each atom in dichloromethane, CH₂Cl₂?

What is the electron-pair geometry around an atom in a molecule or ion which is surrounded by two lone pairs of electrons and three single bonds.

Which of the following is the correct Lewis dash formula for carbon diselenide?

Which of the following molecules or ions are likely to be free radicals: N₂O, NO, and NO₂?

Rank the following covalent bonds in order of decreasing polarity: C-H, N-H, O-H, and F-H.

Which is the best Lewis structure of CH₂FCO₂H (connectivity correct as given)?

Which of the following is not a valid resonance structure for N₃^-?

Which of the following are possible Lewis structures for a molecule with the formula C₂H₆O?

The nitrogen atom in the cyanide ion, CN^-, is surrounded by:

When both of the electrons in a molecular bond originate from the same atom, the bond is called a(n)

What is the O−C−N bond angle in OCN^-?

What is the molecular geometry around the nitrogen atom_{as per the valence shell electron-pair repulsion}_{(VSEPR) theory?}?

Basic Concepts of Chemistry

Lets Review: the Tools of Quantitative Chemistry

Atoms, Molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, Energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

Exam 9: Bonding and Molecular Structure

If a molecule has a positive and negative end, the molecule is said to have a(n) ________ moment.

What is the formal charge on each atom in dichloromethane, CH2Cl2?

What is the electron-pair geometry around an atom in a molecule or ion which is surrounded by two lone pairs of electrons and three single bonds.

Which of the following is the correct Lewis dash formula for carbon diselenide?

Which of the following molecules or ions are likely to be free radicals: N2O, NO, and NO2?

Rank the following covalent bonds in order of decreasing polarity: C-H, N-H, O-H, and F-H.

Which is the best Lewis structure of CH2FCO2H (connectivity correct as given)?

Which of the following is not a valid resonance structure for N3-?

Which of the following are possible Lewis structures for a molecule with the formula C2H6O?

The nitrogen atom in the cyanide ion, CN-, is surrounded by:

When both of the electrons in a molecular bond originate from the same atom, the bond is called a(n)

What is the O−C−N bond angle in OCN-?

What is the molecular geometry around the nitrogen atom as per the valence shell electron-pair repulsion (VSEPR) theory?? ​ ​

Basic Concepts of Chemistry

Lets Review: the Tools of Quantitative Chemistry

Atoms, Molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, Energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

What is the formal charge on each atom in dichloromethane, CH₂Cl₂?

Which of the following molecules or ions are likely to be free radicals: N₂O, NO, and NO₂?

Which is the best Lewis structure of CH₂FCO₂H (connectivity correct as given)?

Which of the following is not a valid resonance structure for N₃^-?

Which of the following are possible Lewis structures for a molecule with the formula C₂H₆O?

The nitrogen atom in the cyanide ion, CN^-, is surrounded by:

What is the O−C−N bond angle in OCN^-?

What is the molecular geometry around the nitrogen atom_{as per the valence shell electron-pair repulsion}_{(VSEPR) theory?}?