Question 1

How many resonance structures can be written for the NO3- ion in which the nitrogen atom bears a formal charge of +1?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 2

The bond that results when two atoms share a pair of electrons is called a ___.

Accepted Answer

The answer of The bond that results when two atoms...

Question 3

Select the least electronegative element from the list below.

Accepted Answer

A) P 
B) N 
C) Mg 
D) Si 
E) K 
A) P 
B) N 
C) Mg 
D) Si 
E) K

Question 4

Draw the Lewis structure of acetic acid,CH3CO2H,clearly indicating all non-bonding pairs of electrons.

Accepted Answer

Question 5

How many sigma 1s-2sp3 bonds are there in ethane?

Accepted Answer

A) 7 
B) 6 
C) 5 
D) 3 
E) 1 
A) 7 
B) 6 
C) 5 
D) 3 
E) 1

Question 6

Based on VSEPR theory,which of the following would have a trigonal planar shape?

Accepted Answer

A) (CH3)3N 
B) HCN 
C) NH4+ 
D) CH3- 
E) CH3+ 
A) (CH3)3N 
B) HCN 
C) NH4+ 
D) CH3- 
E) CH3+

Question 7

Consider the following: CH3CH2CH2CH=CHCH2CH2CH3   CH3CH2CH2CH2CH2CH2CH=CH2
I II
CH3CH2CH=CHCH2CH2CH2CH3   CH2=CHCH2CH2CH2CH2CH2CH3
III IV
Which structures can exist as cis-trans isomers?

Accepted Answer

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

Question 8

Which of the following species is/are a resonance form(s)of the species in the box?

Accepted Answer

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

Question 9

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 10

Which compound is not a constitutional isomer of the others?

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

Organic compounds were originally defined as compounds obtained from ___.

Accepted Answer

living sou

Question 13

When two waves with equal amplitude and the opposite phase sign interact this results in generating

Accepted Answer

A) a wave that has half the amplitude of the original wave. 
B) a wave that has double the amplitude of the original wave. 
C) no wave as it has an amplitude of zero. 
D) two new waves that have opposite phase signs of each other. 
E) none of these choices. 
A) a wave that has half the amplitude of the original wave. 
B) a wave that has double the amplitude of the original wave. 
C) no wave as it has an amplitude of zero. 
D) two new waves that have opposite phase signs of each other. 
E) none of these choices.

Question 14

How many 2p atomic orbitals from boron must be mixed with a 2s atomic orbital to yield the bonding hybrid atomic orbitals in BF3?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 15

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 16

The bond angle for the C-C-O bonds in the following compound 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 17

Identify the atomic orbital the lone pair electrons on the N atom are contained in:

Accepted Answer

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

Question 18

Identify the hybridized orbitals involved in the C-2-C-3 sigma bond (indicated by an arrow)in the following molecule:

Accepted Answer

A) sp2,sp2 
B) sp2,sp 
C) sp2,sp3 
D) sp3,sp2 
E) sp,sp2 
A) sp2,sp2 
B) sp2,sp 
C) sp2,sp3 
D) sp3,sp2 
E) sp,sp2

Question 19

Which is the shortest of the carbon-carbon single bonds indicated by arrows in the following compounds?

Accepted Answer

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

Question 20

How many total sigma bonds are present in the following compound?

Accepted Answer

A) 3 
B) 7 
C) 10 
D) 15 
E) None of these choices. 
A) 3 
B) 7 
C) 10 
D) 15 
E) None of these choices.

Exam 1: The Basics

How many resonance structures can be written for the NO3- ion in which the nitrogen atom bears a formal charge of +1?

The bond that results when two atoms share a pair of electrons is called a ___.

Select the least electronegative element from the list below.

Draw the Lewis structure of acetic acid,CH3CO2H,clearly indicating all non-bonding pairs of electrons.

How many sigma 1s-2sp3 bonds are there in ethane?

Based on VSEPR theory,which of the following would have a trigonal planar shape?

Consider the following: CH3CH2CH2CH=CHCH2CH2CH3 CH3CH2CH2CH2CH2CH2CH=CH2 I II CH3CH2CH=CHCH2CH2CH2CH3 CH2=CHCH2CH2CH2CH2CH2CH3 III IV Which structures can exist as cis-trans isomers?

Which of the following species is/are a resonance form(s)of the species in the box?

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

Which compound is not a constitutional isomer of the others?

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

Organic compounds were originally defined as compounds obtained from ___.

When two waves with equal amplitude and the opposite phase sign interact this results in generating

How many 2p atomic orbitals from boron must be mixed with a 2s atomic orbital to yield the bonding hybrid atomic orbitals in BF3?

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

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

Identify the atomic orbital the lone pair electrons on the N atom are contained in:

Identify the hybridized orbitals involved in the C-2-C-3 sigma bond (indicated by an arrow)in the following molecule:

Which is the shortest of the carbon-carbon single bonds indicated by arrows in the following compounds?

How many total sigma bonds are present in the following compound?

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 resonance structures can be written for the NO₃^- ion in which the nitrogen atom bears a formal charge of +1?

Draw the Lewis structure of acetic acid,CH₃CO₂H,clearly indicating all non-bonding pairs of electrons.

How many sigma 1s-2sp³ bonds are there in ethane?

Consider the following: CH₃CH₂CH₂CH=CHCH₂CH₂CH₃CH₃CH₂CH₂CH₂CH₂CH₂CH=CH₂ I II CH₃CH₂CH=CHCH₂CH₂CH₂CH₃CH₂=CHCH₂CH₂CH₂CH₂CH₂CH₃ III IV Which structures can exist as cis-trans isomers?

How many 2p atomic orbitals from boron must be mixed with a 2s atomic orbital to yield the bonding hybrid atomic orbitals in BF₃?