Question 1

The bond angles for the bold-faced C in CH3CH2CH2+ would be expected to be approximately:

Accepted Answer

A) 60S1U1P1$\circ$S1S1P0 
B) 90S1U1P1$\circ$S1S1P0 
C) 105S1U1P1$\circ$S1S1P0 
D) 109S1U1P1$\circ$S1S1P0 
E) 120S1U1P1$\circ$S1S1P0 
A) 60S1U1P1$\circ$S1S1P0 
B) 90S1U1P1$\circ$S1S1P0 
C) 105S1U1P1$\circ$S1S1P0 
D) 109S1U1P1$\circ$S1S1P0 
E) 120S1U1P1$\circ$S1S1P0

Question 2

Which of the following contains an sp2-hybridized carbon?

Accepted Answer

A) CH4 
B) CH3: - 
C) CH3CH3 
D) CH3+ 
E) HC$\equiv$CH 
A) CH4 
B) CH3: - 
C) CH3CH3 
D) CH3+ 
E) HC$\equiv$CH

Question 3

In which structure(s)below does the oxygen have a formal charge of +1?   s

Accepted Answer

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

Question 4

Which of the following is an ion with a negative one charge?

Accepted Answer

A)    
B)    
C)    
D) All of these choices. 
E) None of these choices. 
A)    
B)    
C)    
D) All of these choices. 
E) None of these choices.

Question 5

Which of the following molecules or ions has a nitrogen with a formal charge of -1?

Accepted Answer

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

Question 6

Which of the following species is/are not a resonance form(s)of the anionic species in the box?

Accepted Answer

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

Question 7

Which of the following species exhibits resonance stabilization?

Accepted Answer

A) H2SO4 
B) O3 
C) CO2 
D) CCl4 
E) None of the species exhibit resonance. 
A) H2SO4 
B) O3 
C) CO2 
D) CCl4 
E) None of the species exhibit resonance.

Question 8

In which structure(s)below does nitrogen have a formal charge of +1?

Accepted Answer

A) I 
B) II and IV 
C) III and V 
D) I and V 
E) V 
A) I 
B) II and IV 
C) III and V 
D) I and V 
E) V

Question 9

Draw the Lewis structure of nitroethane CH3CH2NO2,clearly indicating resonance contributors as well as non-bonding pairs of electrons and formal charges,as relevant.

Accepted Answer

The answer of Draw the Lewis structure of nitroethane CH3CH2NO2,clearly...

Question 10

There are three fundamental rules that we use in writing electronic configurations for atoms and molecules.The configuration shown below (for oxygen)violates one of these rules.Which one?

Accepted Answer

Pauli excl

Question 11

Identify the atomic and/or hybridized orbitals in the C-O sigma bond in acetone.

Accepted Answer

A) (2sp2,2sp2) 
B) (2sp3,2sp3) 
C) (2sp,2sp) 
D) (2p,2p) 
E) (2sp,1s) 
A) (2sp2,2sp2) 
B) (2sp3,2sp3) 
C) (2sp,2sp) 
D) (2p,2p) 
E) (2sp,1s)

Question 12

Considering Lewis structures,which of these compounds possesses a single unpaired electron?

Accepted Answer

A) N2 
B) N2O 
C) NO 
D) N2O4 
E) O2 
A) N2 
B) N2O 
C) NO 
D) N2O4 
E) O2

Question 13

Which of the following species is/are not a resonance form(s)of the species in the box?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) More than two of these choices are incorrect resonance forms. 
A) I 
B) II 
C) III 
D) IV 
E) More than two of these choices are incorrect resonance forms.

Question 14

According to molecular orbital theory,in the case of a carbon-carbon double bond,the carbon-carbon bonding electrons of higher energy occupy this molecular orbital:

Accepted Answer

A) " $\sigma$ bonding MO" 
B) "$\pi$ bonding MO" 
C) " $\sigma$* antibonding MO" 
D) "$\pi$* antibonding MO" 
E) "$\pi$* bonding MO" 
A) " $\sigma$ bonding MO" 
B) "$\pi$ bonding MO" 
C) " $\sigma$* antibonding MO" 
D) "$\pi$* antibonding MO" 
E) "$\pi$* bonding MO"

Question 15

Which of the following species are resonance forms of the species in the box?

Accepted Answer

A) I and III 
B) I and II 
C) III and IV 
D) II and IV 
E) All of these choices are correct resonance forms. 
A) I and III 
B) I and II 
C) III and IV 
D) II and IV 
E) All of these choices are correct resonance forms.

Question 16

Listed below are electron dot formulas for several simple molecules and ions.All valence electrons are shown; however,electrical charges have been omitted deliberately.   Which of the structures is negatively charged?

Accepted Answer

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

Question 17

Which of the following species is a resonance form of the following species?

Accepted Answer

A)    
B)    
C)    
D)    
E) All of these choices are correct resonance forms. 
A)    
B)    
C)    
D)    
E) All of these choices are correct resonance forms.

Question 18

Identify the atomic orbitals in the C-H sigma bond in acetylene (ethyne).

Accepted Answer

A) (2sp2,1s) 
B) (2sp3,2sp3) 
C) (2sp,2sp) 
D) (2p,2p) 
E) (2sp,1s) 
A) (2sp2,1s) 
B) (2sp3,2sp3) 
C) (2sp,2sp) 
D) (2p,2p) 
E) (2sp,1s)

Question 19

Draw the Lewis structure of the nitrite ion,NO2-,clearly indicating resonance contributors as well as non-bonding pairs of electrons and formal charges,as relevant.

Accepted Answer

The answer of Draw the Lewis structure of the nitrite...

Question 20

When atomic orbitals of the same phase overlap a(n)___ molecular orbital is formed.

Accepted Answer

The answer of When atomic orbitals of the same phase...

Exam 1: The Basics

The bond angles for the bold-faced C in CH3CH2CH2+ would be expected to be approximately:

Which of the following contains an sp2-hybridized carbon?

In which structure(s)below does the oxygen have a formal charge of +1? s

Which of the following is an ion with a negative one charge?

Which of the following molecules or ions has a nitrogen with a formal charge of -1?

Which of the following species is/are not a resonance form(s)of the anionic species in the box?

Which of the following species exhibits resonance stabilization?

In which structure(s)below does nitrogen have a formal charge of +1?

Draw the Lewis structure of nitroethane CH3CH2NO2,clearly indicating resonance contributors as well as non-bonding pairs of electrons and formal charges,as relevant.

There are three fundamental rules that we use in writing electronic configurations for atoms and molecules.The configuration shown below (for oxygen)violates one of these rules.Which one?

Identify the atomic and/or hybridized orbitals in the C-O sigma bond in acetone.

Considering Lewis structures,which of these compounds possesses a single unpaired electron?

Which of the following species is/are not a resonance form(s)of the species in the box?

According to molecular orbital theory,in the case of a carbon-carbon double bond,the carbon-carbon bonding electrons of higher energy occupy this molecular orbital:

Which of the following species are resonance forms of the species in the box?

Listed below are electron dot formulas for several simple molecules and ions.All valence electrons are shown; however,electrical charges have been omitted deliberately. Which of the structures is negatively charged?

Which of the following species is a resonance form of the following species?

Identify the atomic orbitals in the C-H sigma bond in acetylene (ethyne).

Draw the Lewis structure of the nitrite ion,NO2-,clearly indicating resonance contributors as well as non-bonding pairs of electrons and formal charges,as relevant.

When atomic orbitals of the same phase overlap a(n)___ molecular orbital is formed.

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

The bond angles for the bold-faced C in CH₃CH₂CH₂⁺ would be expected to be approximately:

Which of the following contains an sp²-hybridized carbon?

Draw the Lewis structure of nitroethane CH₃CH₂NO₂,clearly indicating resonance contributors as well as non-bonding pairs of electrons and formal charges,as relevant.

Draw the Lewis structure of the nitrite ion,NO₂^-,clearly indicating resonance contributors as well as non-bonding pairs of electrons and formal charges,as relevant.