Question 1

What is (are) the major organic product(s) formed in the following reaction?

Accepted Answer

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

Question 2

What is (are) the major organic product(s) formed in the following reaction?

Accepted Answer

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

Question 3

Which of the following electronic transitions is apparent in the ultraviolet-visible spectrum of 1,3-butadiene?

Accepted Answer

A)  n→p* 
B)  p→p * 
C)  s→p * 
D)  s→p 
A)  n→p* 
B)  p→p * 
C)  s→p * 
D)  s→p

Question 4

What is the IUPAC name of the following compound?

Accepted Answer

(E)-2,3-di

Question 5

Which of the following has the highest value of lmax in the ultraviolet-visible spectrum?

Accepted Answer

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

Question 6

Which of the following relationships is not valid as applied to ultraviolet-visible spectroscopy?

Accepted Answer

A)  A = log (Io/I) 
B)  A = ecl 
C)  DE = hn 
D)  A = lmaxl 
A)  A = log (Io/I) 
B)  A = ecl 
C)  DE = hn 
D)  A = lmaxl

Question 7

Draw two resonance structures of the reactive intermediate that accounts for the formation of 1,2- and 1,4-addition products upon reaction of 1,3-butadiene with one equivalent of HBr.

Accepted Answer

The answer of Draw two resonance structures of the reactive...

Question 8

What is the major organic product obtained from the following reaction?

Accepted Answer

The answer of What is the major organic product obtained...

Question 9

What is the correct order of exothermicity for hydrogenation of the following hexadienes upon treatment with H2/Pd (more exothermic > less exothermic)?

Accepted Answer

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

Question 10

Which of the following are conjugated dienes?

Accepted Answer

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

Question 11

What is (are) the major organic product(s) formed in the following reaction?

Accepted Answer

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

Question 12

Which of the following is not a major organic product obtained from the addition of 1 mole of bromine to (E)-1,3-pentadiene?

Accepted Answer

A)  (
E) -4,5-dibromo-2-pentene 
B)  3,4-dibromo-1-pentene 
C)  (
E) -1,4-dibromo-2-pentene 
D)  (
E) -1,2-dibromo-2-pentene 
A)  (
E) -4,5-dibromo-2-pentene 
B)  3,4-dibromo-1-pentene 
C)  (
E) -1,4-dibromo-2-pentene 
D)  (
E) -1,2-dibromo-2-pentene

Question 13

Which of the following laws relates absorbance to the concentration of a sample and the pathlength in ultraviolet-visible spectroscopy?

Accepted Answer

A)  Buzz-Beer law 
B)  Beer-Lambert law 
C)  Duff-Beer law 
D)  Christopher-Lambert law 
A)  Buzz-Beer law 
B)  Beer-Lambert law 
C)  Duff-Beer law 
D)  Christopher-Lambert law

Question 14

What quantity is abbreviated as e in ultraviolet-visible spectroscopy?

Accepted Answer

A)  absorbance 
B)  molecular absorptivity 
C)  intensity of transmitted light 
D)  wavelength of maximum absorbance 
A)  absorbance 
B)  molecular absorptivity 
C)  intensity of transmitted light 
D)  wavelength of maximum absorbance

Question 15

Which of the following energy diagrams represents the electronic state of the ground state of 1,3-butadiene?

Accepted Answer

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

Question 16

What are the units of e in ultraviolet-visible spectroscopy?

Accepted Answer

A)  M-1*cm-1 
B)  M*cm 
C)  J*mol-1*M-1 
D)  none, e is a dimensionless quantity 
A)  M-1*cm-1 
B)  M*cm 
C)  J*mol-1*M-1 
D)  none, e is a dimensionless quantity

Question 17

Which of the following electronic transitions is (are) apparent in the ultraviolet-visible spectrum of acrolein, H2C=CHCHO? 
1.n→p*
2.p→p*
3.s→ p*

Accepted Answer

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

Question 18

Which of the following alkenes undergoes the least exothermic hydrogenation upon treatment with H2/Pd

Accepted Answer

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

Question 19

What are the two major organic products obtained from the following reaction?

Accepted Answer

The answer of What are the two major organic products...

Question 20

What is the IUPAC name of the following compound?

Accepted Answer

(E)-2,3-di

Exam 20: Dienes, Conjugated Systems, and Pericyclic Reactions

What is (are) the major organic product(s) formed in the following reaction?

What is (are) the major organic product(s) formed in the following reaction?

Which of the following electronic transitions is apparent in the ultraviolet-visible spectrum of 1,3-butadiene?

What is the IUPAC name of the following compound?

Which of the following has the highest value of lmax in the ultraviolet-visible spectrum?

Which of the following relationships is not valid as applied to ultraviolet-visible spectroscopy?

Draw two resonance structures of the reactive intermediate that accounts for the formation of 1,2- and 1,4-addition products upon reaction of 1,3-butadiene with one equivalent of HBr.

What is the major organic product obtained from the following reaction?

What is the correct order of exothermicity for hydrogenation of the following hexadienes upon treatment with H2/Pd (more exothermic > less exothermic)?

Which of the following are conjugated dienes?

What is (are) the major organic product(s) formed in the following reaction?

Which of the following is not a major organic product obtained from the addition of 1 mole of bromine to (E)-1,3-pentadiene?

Which of the following laws relates absorbance to the concentration of a sample and the pathlength in ultraviolet-visible spectroscopy?

What quantity is abbreviated as e in ultraviolet-visible spectroscopy?

Which of the following energy diagrams represents the electronic state of the ground state of 1,3-butadiene?

What are the units of e in ultraviolet-visible spectroscopy?

Which of the following electronic transitions is (are) apparent in the ultraviolet-visible spectrum of acrolein, H2C=CHCHO? 1.n→p* 2.p→p* 3.s→ p*

Which of the following alkenes undergoes the least exothermic hydrogenation upon treatment with H2/Pd

What are the two major organic products obtained from the following reaction?

What is the IUPAC name of the following compound?

Covalent Bonding and Shapes of Molecules

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Filters

Which of the following has the highest value of l_max in the ultraviolet-visible spectrum?

What is the correct order of exothermicity for hydrogenation of the following hexadienes upon treatment with H₂/Pd (more exothermic > less exothermic)?

Which of the following electronic transitions is (are) apparent in the ultraviolet-visible spectrum of acrolein, H₂C=CHCHO? 1.n→p* 2.p→p* 3.s→ p*

Which of the following alkenes undergoes the least exothermic hydrogenation upon treatment with H₂/Pd