Question 1

How many s-sp2 bonds are there in the following substance?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 12 
A) 2 
B) 3 
C) 4 
D) 5 
E) 12

Question 2

Which of the following compounds is not a constitutional isomer of the others?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) All of these choices are constitutional isomers. 
A) I 
B) II 
C) III 
D) IV 
E) All of these choices are constitutional isomers.

Question 3

Which of the following species contributes more to the overall hybrid for the species in the box?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) The one in the box. 
A) I 
B) II 
C) III 
D) IV 
E) The one in the box.

Question 4

The relative probability of finding an electron a certain distance from the nucleus can be calculated using ___.

Accepted Answer

A) electron configuration 
B) the wave function 
C) statistical probability 
D) atomic orbitals 
E) all of these choices 
A) electron configuration 
B) the wave function 
C) statistical probability 
D) atomic orbitals 
E) all of these choices

Question 5

What is the hybridization of the C atom in the following molecule?

Accepted Answer

A) s 
B) p 
C) sp 
D) sp2 
E) sp3 
A) s 
B) p 
C) sp 
D) sp2 
E) sp3

Question 6

What is the formal charge on carbon in the following structure?

Accepted Answer

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

Question 7

Which of the structures below is not expected to contribute to the CO2 resonance hybrid?

Accepted Answer

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

Question 8

In which molecule is the central atom sp3 hybridized?

Accepted Answer

A) CH4 
B) NH3 
C) H2O 
D) All of these choices. 
E) None of these choices. 
A) CH4 
B) NH3 
C) H2O 
D) All of these choices. 
E) None of these choices.

Question 9

Which of the following could not be a resonance structure of CH3NO2?

Accepted Answer

A)    
B)    
C)    
D)    
E) More than one of these choices. 
A)    
B)    
C)    
D)    
E) More than one of these choices.

Question 10

VSEPR theory predicts an identical shape for all of the following,except:

Accepted Answer

A) NH3 
B) H3O+ 
C) BH3 
D) CH3- 
E) All of these choices have the same geometry. 
A) NH3 
B) H3O+ 
C) BH3 
D) CH3- 
E) All of these choices have the same geometry.

Question 11

Which of the following species contributes more to the overall hybrid for the species in the box?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) The one in the box. 
A) I 
B) II 
C) III 
D) IV 
E) The one in the box.

Question 12

Based on the VSEPR theory,which of the following would have a tetrahedral arrangement of electrons around the central atom?

Accepted Answer

A) BH3 
B) NO2- 
C) SiH4 
D) CO32- 
E) SO3 
A) BH3 
B) NO2- 
C) SiH4 
D) CO32- 
E) SO3

Question 13

Which of the following species contributes more to the overall hybrid for the species in the box?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) The one in the box. 
A) I 
B) II 
C) III 
D) IV 
E) The one in the box.

Question 14

Which compound has the shortest carbon-carbon bond(s)?

Accepted Answer

A) CH3CH3 
B) CH2=CH2 
C) HC$\equiv$CH 
D) CH3CH2CH3 
E) All carbon-carbon bonds are the same length. 
A) CH3CH3 
B) CH2=CH2 
C) HC$\equiv$CH 
D) CH3CH2CH3 
E) All carbon-carbon bonds are the same length.

Question 15

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

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 16

The bond angle for the C-O-C bonds in the following molecule would be expected to be approximately:

Accepted Answer

A) 90S1U1P1$\circ$S1S1P0 
B) 109S1U1P1$\circ$S1S1P0 
C) 120S1U1P1$\circ$S1S1P0 
D) 145S1U1P1$\circ$S1S1P0 
E) 180S1U1P1$\circ$S1S1P0 
A) 90S1U1P1$\circ$S1S1P0 
B) 109S1U1P1$\circ$S1S1P0 
C) 120S1U1P1$\circ$S1S1P0 
D) 145S1U1P1$\circ$S1S1P0 
E) 180S1U1P1$\circ$S1S1P0

Question 17

Draw all isomers of C4H8,using bond-line formulas.

Accepted Answer

Question 18

Which compound contains a nitrogen atom with a formal positive charge?

Accepted Answer

A) I 
B) II 
C) III 
D) More than one of these choices. 
E) None of these choices. 
A) I 
B) II 
C) III 
D) More than one of these choices. 
E) None of these choices.

Question 19

What point on the potential energy diagram below represents the most stable state for the hydrogen molecule?

Accepted Answer

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

Question 20

Which compound is not a constitutional isomer of the others?

Accepted Answer

A) I and II 
B) II 
C) III 
D) IV and V 
E) All of these choices are isomers of each other. 
A) I and II 
B) II 
C) III 
D) IV and V 
E) All of these choices are isomers of each other.

Exam 1: The Basics

How many s-sp2 bonds are there in the following substance?

Which of the following compounds is not a constitutional isomer of the others?

Which of the following species contributes more to the overall hybrid for the species in the box?

The relative probability of finding an electron a certain distance from the nucleus can be calculated using ___.

What is the hybridization of the C atom in the following molecule?

What is the formal charge on carbon in the following structure?

Which of the structures below is not expected to contribute to the CO2 resonance hybrid?

In which molecule is the central atom sp3 hybridized?

Which of the following could not be a resonance structure of CH3NO2?

VSEPR theory predicts an identical shape for all of the following,except:

Which of the following species contributes more to the overall hybrid for the species in the box?

Based on the VSEPR theory,which of the following would have a tetrahedral arrangement of electrons around the central atom?

Which of the following species contributes more to the overall hybrid for the species in the box?

Which compound has the shortest carbon-carbon bond(s)?

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

The bond angle for the C-O-C bonds in the following molecule would be expected to be approximately:

Draw all isomers of C4H8,using bond-line formulas.

Which compound contains a nitrogen atom with a formal positive charge?

What point on the potential energy diagram below represents the most stable state for the hydrogen molecule?

Which compound is not a constitutional isomer of the others?

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

How many s-sp² bonds are there in the following substance?

Which of the structures below is not expected to contribute to the CO₂ resonance hybrid?

In which molecule is the central atom sp³ hybridized?

Which of the following could not be a resonance structure of CH₃NO₂?

Draw all isomers of C₄H₈,using bond-line formulas.