Question 1

Which of the following alkenes undergoes allylic bromination to form a single monobrominated product?

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) None of the above
F) A) and D)

Question 2

How many allylic halides can be formed when 3-methycyclohexene undergoes allylic halogenation with one equivalent of NBS and light?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) B) and C)
F) A) and D)

Question 3

Find the major product of the following reaction.

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) A) and C)
F) B) and D)

Question 4

Which of the following statements about bromination is true?

Accepted Answer

A)  The rate-determining step in bromination is exothermic.
B)  Both radicals are formed.
C)  A mixture of products results.
D)  A single radical halogenation product predominates.E) A) and B)
F) None of the above

Question 5

How many products,including stereoisomers,are formed when (R) -2,4-dimethylhex-2-ene is treated with HBr in presence of peroxides?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) B) and C)
F) A) and C)

Question 6

Rank the following radicals in order of decreasing stability,putting the most stable first.  IV > III > I B) III > II > IV > I C) IV > III > II > I D) IV > III > I > II" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  II > IV > III > I
B)  III > II > IV > I
C)  IV > III > II > I
D)  IV > III > I > IIE) A) and B)
F) All of the above

Question 7

Determine the product(s) of the following reaction.

Accepted Answer

A)  Only I
B)  Only II
C)  Only III
D)  Only I and IIE) B) and C)
F) C) and D)

Question 8

What type of reactive intermediate is formed in the reaction of propene with N-bromosuccinimide (NBS) to give 3-bromo-1-propene?

Accepted Answer

A)  Cyclic bromonium ion
B)  Allylic carbocation
C)  Allylic carbanion
D)  Allylic radicalE) A) and B)
F) C) and D)

Question 9

For a radical reaction,put the following steps in the correct order: 1.Initiation
2) Propagation
3) Termination

Accepted Answer

A)  1,2,3
B)  1,3,2
C)  2,3,1
D)  3,2,1E) A) and D)
F) C) and D)

Question 10

What is the product of the following reaction?

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) All of the above
F) A) and B)

Question 11

What is the product in the following sequence of reactions?

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) All of the above
F) A) and B)

Question 12

Which of the following statements about chlorination is true?

Accepted Answer

A)  The rate-determining step in chlorination is endothermic.
B)  The transition state resembles the product.
C)  The more stable radical is formed faster.
D)  A mixture of products results.E) A) and B)
F) A) and C)

Question 13

Which of the following is a radical scavenger?

Accepted Answer

A)  O3
B)  O2
C)  Vitamin C
D)  CO2E) None of the above
F) All of the above

Question 14

Identify the monomer used to make the following polymer.

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) A) and B)
F) None of the above

Question 15

How many products,including stereoisomers,are formed when 2-methylpent-2-ene is treated with HBr in presence of peroxides?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) None of the above
F) A) and B)

Question 16

Which of the following statements about radicals and radical reactions is not true?

Accepted Answer

A)  Most radicals are unstable.
B)  A radical contains an atom that has an octet of electrons.
C)  Half-headed arrows are used to show the movement of lone electrons.
D)  A radical is formed by homolysis of a covalent bond.E) All of the above
F) B) and C)

Question 17

Which of the following statements about chlorination and bromination is true?

Accepted Answer

A)  Bromination is unselective,yielding a mixture of products.
B)  Chlorination is often selective,yielding one major product.
C)  Chlorination is faster than bromination.
D)  Bromination is faster than chlorination.E) All of the above
F) A) and D)

Question 18

Which of the following statements about radical reactions is not true?

Accepted Answer

A)  Light or heat provides the energy needed for homolytic bond cleavage to form radicals.
B)  Breaking the weak O-O bond of peroxides initiates radical reactions.
C)  The diradical O2 removes radicals from a reaction mixture.
D)  Radicals rearrange.E) B) and D)
F) B) and C)

Question 19

Which of the following statements about carbon radicals is not true?

Accepted Answer

A)  Carbon radicals are classified as primary,secondary,tertiary,or quaternary.
B)  A carbon radical is sp2 hybridized.
C)  The geometry of a carbon radical is trigonal planar.
D)  The unhybridized p orbital in a carbon radical contains the unpaired electron.E) A) and B)
F) A) and C)

Question 20

Rank the following in order of increasing stability.

Accepted Answer

A)  I 
B)  II 
C)  I 
D)  IV < III < II < IE) A) and B)
F) C) and D)

Exam 13: Radical Reactions

Which of the following alkenes undergoes allylic bromination to form a single monobrominated product?

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How many products,including stereoisomers,are formed when 2-methylpent-2-ene is treated with HBr in presence of peroxides?

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How many allylic halides can be formed when 3-methycyclohexene undergoes allylic halogenation with one equivalent of NBS and light?

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Rank the following in order of increasing stability.

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Which of the following statements about bromination is true?

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Identify the monomer used to make the following polymer.

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Which of the following statements about carbon radicals is not true?

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Find the major product of the following reaction.

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Which of the following statements about chlorination and bromination is true?

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Which of the following statements about chlorination is true?

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Which of the following is a radical scavenger?

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What type of reactive intermediate is formed in the reaction of propene with N-bromosuccinimide (NBS) to give 3-bromo-1-propene?

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How many products,including stereoisomers,are formed when (R) -2,4-dimethylhex-2-ene is treated with HBr in presence of peroxides?

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What is the product in the following sequence of reactions?

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For a radical reaction,put the following steps in the correct order: 1.Initiation 2) Propagation 3) Termination

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What is the product of the following reaction?

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Which of the following statements about radicals and radical reactions is not true?

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Determine the product(s) of the following reaction.

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Which of the following statements about radical reactions is not true?

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Rank the following radicals in order of decreasing stability,putting the most stable first.

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