Question 1

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

Question 2

Find the major product of the following reaction.

Accepted Answer

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

Question 3

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

Accepted Answer

A) II > IV > III > I 
B) III > II > IV > I 
C) IV > III > II > I 
D) IV > III > I > II 
A) II > IV > III > I 
B) III > II > IV > I 
C) IV > III > II > I 
D) IV > III > I > II

Question 4

What is the product in the following sequence of reactions?

Accepted Answer

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

Question 5

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. 
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.

Question 6

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. 
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.

Question 7

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

Question 8

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. 
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.

Question 9

Determine the product(s)of the following reaction.

Accepted Answer

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

Question 10

Rank the following in order of increasing stability.

Accepted Answer

A) I < II < III < IV 
B) II < I < III < IV 
C) I < II < IV < III 
D) IV < III < II < I 
A) I < II < III < IV 
B) II < I < III < IV 
C) I < II < IV < III 
D) IV < III < II < I

Question 11

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. 
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.

Question 12

What is the product of the following reaction?

Accepted Answer

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

Question 13

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. 
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.

Question 14

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

Question 15

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. 
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.

Question 16

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 radical 
A) Cyclic bromonium ion 
B) Allylic carbocation 
C) Allylic carbanion 
D) Allylic radical

Question 17

Which of the following is a radical scavenger?

Accepted Answer

A) O3 
B) O2 
C) Vitamin C 
D) CO2 
A) O3 
B) O2 
C) Vitamin C 
D) CO2

Question 18

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

Question 19

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

Accepted Answer

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

Question 20

Identify the monomer used to make the following polymer.

Accepted Answer

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

Exam 13: Radical Reactions

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

Find the major product of the following reaction.

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

What is the product in the following sequence of reactions?

Which of the following statements about bromination is true?

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

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

Which of the following statements about chlorination is true?

Determine the product(s)of the following reaction.

Rank the following in order of increasing stability.

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

What is the product of the following reaction?

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

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

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

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

Which of the following is a radical scavenger?

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

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

Identify the monomer used to make the following polymer.

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols,ethers,and Related Compounds

Alkenes and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Conjugation,resonance,and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Spectroscopy A: Mass Spectrometry

Spectroscopy B: Infrared Spectroscopy

Spectroscopy C: Nuclear Magnetic Resonance Spectroscopy

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