Question 1

Which of the following statements about bonding is true?

Accepted Answer

A)  Covalent bonds result from the transfer of electrons from one element to another. 
B)  Ionic bonds result from the transfer of electrons from a metal to a non-metal. 
C)  Ionic bonds result from the sharing of electrons between two non-metals. 
D)  Covalent bonds result from the sharing of electrons between two metals. 
A)  Covalent bonds result from the transfer of electrons from one element to another. 
B)  Ionic bonds result from the transfer of electrons from a metal to a non-metal. 
C)  Ionic bonds result from the sharing of electrons between two non-metals. 
D)  Covalent bonds result from the sharing of electrons between two metals.

Question 2

Which atomic orbitals overlap to form the carbon-carbon F1F1F1S1F1F1F10 bonding molecular orbital of acetylene, C2H2?

Accepted Answer

A)  Csp2 + Csp2 
B)  Csp + Csp 
C)  Csp3 + Csp3 
D)  C2p + C2p 
A)  Csp2 + Csp2 
B)  Csp + Csp 
C)  Csp3 + Csp3 
D)  C2p + C2p

Question 3

When forming molecular orbitals from atomic orbitals, what is the order of increasing C-H bond strength for the following.

Accepted Answer

A)  II < I < III 
B)  III < I < II 
C)  III < II < I 
D)  I < II < III 
A)  II < I < III 
B)  III < I < II 
C)  III < II < I 
D)  I < II < III

Question 4

Which atomic orbitals overlap to form the carbon-carbon F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10 bonding molecular orbitals of ethylene, H2C=CH2?

Accepted Answer

A)  Csp3 + Csp3, and C2p + C2p 
B)  Csp3 + Csp3, and Csp2 + Csp2 
C)  Csp2 + Csp2, and C2p + C2p 
D)  Csp2 + Csp2, and Csp2 + Csp2 
A)  Csp3 + Csp3, and C2p + C2p 
B)  Csp3 + Csp3, and Csp2 + Csp2 
C)  Csp2 + Csp2, and C2p + C2p 
D)  Csp2 + Csp2, and Csp2 + Csp2

Question 5

In which structure is the hybridization incorrect?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
A)  I 
B)  II 
C)  III 
D)  IV

Question 6

Which of the following molecules has the smallest dipole moment?

Accepted Answer

A)  CO2 
B)  HCl 
C)  H2O 
D)  NH3 
A)  CO2 
B)  HCl 
C)  H2O 
D)  NH3

Question 7

What is the approximate H-C-O bond angle in formaldehyde, H2CO?

Accepted Answer

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

Question 8

How many constitutional isomers are there for a molecule having the molecular formula C3H6?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 9

What 2 things will change between two resonance structures?

Accepted Answer

A)  The position of multiple bonds and non-bonded electrons. 
B)  The position of multiple bonds and single bonds. 
C)  The placement of atoms and single bonds. 
D)  The placement of atoms and non-bonded electrons. 
A)  The position of multiple bonds and non-bonded electrons. 
B)  The position of multiple bonds and single bonds. 
C)  The placement of atoms and single bonds. 
D)  The placement of atoms and non-bonded electrons.

Question 10

What is the condensed formula of the compound below?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
A)  I 
B)  II 
C)  III 
D)  IV

Question 11

Which of the following molecules has non-polar covalent bonds?

Accepted Answer

A)  CO2 
B)  N2 
C)  CCl4 
D)  HF 
A)  CO2 
B)  N2 
C)  CCl4 
D)  HF

Question 12

Rank the following atoms in order of increasing electronegativity, putting the least electronegative first. $$\begin{array} { c c c c } 
\mathrm { S } & \mathrm { Cl } & \mathrm { F } & \mathrm { N } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Accepted Answer

A)  I < II < III < IV 
B)  I < IV < II < III 
C)  III < II < IV < I 
D)  I < II < IV < III 
A)  I < II < III < IV 
B)  I < IV < II < III 
C)  III < II < IV < I 
D)  I < II < IV < III

Question 13

What is the ground-state electronic configuration of a chlorine anion (Cl-)?

Accepted Answer

A)  1s2, 2s2, 2p6 
B)  1s2, 2s2, 2p6, 3s2, 3p6 
C)  1s2, 2s2, 2p6, 3s2, 3p5 
D)  1s2, 2s2, 2p6, 3s2, 3p4 
A)  1s2, 2s2, 2p6 
B)  1s2, 2s2, 2p6, 3s2, 3p6 
C)  1s2, 2s2, 2p6, 3s2, 3p5 
D)  1s2, 2s2, 2p6, 3s2, 3p4

Question 14

Which is the correct Lewis structure for acetic acid (CH3CO2H)?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
A)  I 
B)  II 
C)  III 
D)  IV

Question 15

What is the approximate bond angle for the C-C-N bond in acetonitrile, CH3CN?

Accepted Answer

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

Question 16

Which of the following statements correctly describes the typical number of bonds for carbon, nitrogen, and oxygen in most neutral organic molecules?

Accepted Answer

A)  Carbon forms 4 covalent bonds, nitrogen forms 2 covalent bonds and oxygen forms 3 covalent bonds. 
B)  Carbon forms 4 covalent bonds, nitrogen forms 3 covalent bonds and oxygen forms 2 covalent bonds. 
C)  Carbon forms 4 covalent bonds, nitrogen forms 5 covalent bonds and oxygen forms 2 covalent bonds. 
D)  Carbon forms 4 covalent bonds, nitrogen forms 5 covalent bonds and oxygen forms 4 covalent bonds. 
A)  Carbon forms 4 covalent bonds, nitrogen forms 2 covalent bonds and oxygen forms 3 covalent bonds. 
B)  Carbon forms 4 covalent bonds, nitrogen forms 3 covalent bonds and oxygen forms 2 covalent bonds. 
C)  Carbon forms 4 covalent bonds, nitrogen forms 5 covalent bonds and oxygen forms 2 covalent bonds. 
D)  Carbon forms 4 covalent bonds, nitrogen forms 5 covalent bonds and oxygen forms 4 covalent bonds.

Question 17

Which of the following statements about resonance structures is true?

Accepted Answer

A)  Resonance structures have the same placement of electrons but different arrangement of atoms. 
B)  Resonance structures have the same placement of atoms but different arrangement of electrons. 
C)  Resonance structures have the same placement of atoms and the same arrangement of electrons. 
D)  Resonance structures have different placement of atoms and different arrangement of electrons. 
A)  Resonance structures have the same placement of electrons but different arrangement of atoms. 
B)  Resonance structures have the same placement of atoms but different arrangement of electrons. 
C)  Resonance structures have the same placement of atoms and the same arrangement of electrons. 
D)  Resonance structures have different placement of atoms and different arrangement of electrons.

Question 18

Rank the following atoms in order of decreasing electronegativity, putting the most electronegative first. $$\begin{array} { l l l l } 
\mathrm { Si } & \mathrm { N } & \text { O } & \text { C } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Accepted Answer

A)  I > IV > II > III 
B)  II > III > IV > I 
C)  III > IV > II > I 
D)  III > II > IV > I 
A)  I > IV > II > III 
B)  II > III > IV > I 
C)  III > IV > II > I 
D)  III > II > IV > I

Question 19

Which is not an acceptable Lewis structure for the anion CH2NCO-?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
A)  I 
B)  II 
C)  III 
D)  IV

Question 20

Which of the following is the appropriate conversion of (CH3)4C to a skeletal structure?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
A)  I 
B)  II 
C)  III 
D)  IV

Exam 1: Structure and Bonding

Which of the following statements about bonding is true?

Which atomic orbitals overlap to form the carbon-carbon  bonding molecular orbital of acetylene, C2H2?

When forming molecular orbitals from atomic orbitals, what is the order of increasing C-H bond strength for the following.

Which atomic orbitals overlap to form the carbon-carbon  and  bonding molecular orbitals of ethylene, H2C=CH2?

In which structure is the hybridization incorrect?

Which of the following molecules has the smallest dipole moment?

What is the approximate H-C-O bond angle in formaldehyde, H2CO?

How many constitutional isomers are there for a molecule having the molecular formula C3H6?

What 2 things will change between two resonance structures?

What is the condensed formula of the compound below?

Which of the following molecules has non-polar covalent bonds?

Rank the following atoms in order of increasing electronegativity, putting the least electronegative first. I II III IV

What is the ground-state electronic configuration of a chlorine anion (Cl-)?

Which is the correct Lewis structure for acetic acid (CH3CO2H)?

What is the approximate bond angle for the C-C-N bond in acetonitrile, CH3CN?

Which of the following statements correctly describes the typical number of bonds for carbon, nitrogen, and oxygen in most neutral organic molecules?

Which of the following statements about resonance structures is true?

Rank the following atoms in order of decreasing electronegativity, putting the most electronegative first. O C I II III IV

Which is not an acceptable Lewis structure for the anion CH2NCO-?

Which of the following is the appropriate conversion of (CH3)4C to a skeletal structure?

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols, Ethers and Epoxides

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Electrophilic Aromatic Substitution

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Lipids

Synthetic Polymers

Filters

Which atomic orbitals overlap to form the carbon-carbon  bonding molecular orbital of acetylene, C₂H₂?

Which atomic orbitals overlap to form the carbon-carbon  and  bonding molecular orbitals of ethylene, H₂C=CH₂?

What is the approximate H-C-O bond angle in formaldehyde, H₂CO?

How many constitutional isomers are there for a molecule having the molecular formula C₃H₆?

What is the ground-state electronic configuration of a chlorine anion (Cl^-)?

Which is the correct Lewis structure for acetic acid (CH₃CO₂H)?

What is the approximate bond angle for the C-C-N bond in acetonitrile, CH₃CN?

Which is not an acceptable Lewis structure for the anion CH₂NCO^-?

Which of the following is the appropriate conversion of (CH₃)₄C to a skeletal structure?