Question 1

Choose the weak base from the compounds below.

Accepted Answer

A) (CH3)2NH 
B) CH3CO2H 
C) CH3COCH3 
D) CH3CH3 
E) CH3CH2F 
A) (CH3)2NH 
B) CH3CO2H 
C) CH3COCH3 
D) CH3CH3 
E) CH3CH2F A

Question 2

Determine the products of the following reaction: Benzene + CH3CH2Cl   ?

Accepted Answer

A) ethylbenzene and HCl 
B) 1,2-dimethylbenzene and H2 
C) chlorobenzene and CH3CH2Al 
D) chlorobenzene and CH3CH3 
E) 1,4-diethylbenzene and Cl2 
A) ethylbenzene and HCl 
B) 1,2-dimethylbenzene and H2 
C) chlorobenzene and CH3CH2Al 
D) chlorobenzene and CH3CH3 
E) 1,4-diethylbenzene and Cl2 A

Question 3

What are the correct products of the following reaction performed in the presence of an acid? C3H7COOCH3 + C2H5OH →

Accepted Answer

A) C3H7COOC2H5 + CH3OH 
B) CH3COOC2H5 + C3H7OH 
C) C3H7COC2H5 + CH3COOH 
D) C3H7OH + C2H5COOCH3 + H3O+ 
E) C3H7CH(OCH3)(OC2H5)+ H2O 
A) C3H7COOC2H5 + CH3OH 
B) CH3COOC2H5 + C3H7OH 
C) C3H7COC2H5 + CH3COOH 
D) C3H7OH + C2H5COOCH3 + H3O+ 
E) C3H7CH(OCH3)(OC2H5)+ H2O A

Question 4

Which of the following compounds is a Grignard reagent?

Accepted Answer

A) (C2H5)2Mg 
B) LiC4H9 
C) CH3Mg(OH) 
D) CH3CH2MgBr 
E) CH3MgOCH3 
A) (C2H5)2Mg 
B) LiC4H9 
C) CH3Mg(OH) 
D) CH3CH2MgBr 
E) CH3MgOCH3

Question 5

What are secondary alcohols oxidized to?

Accepted Answer

A) tertiary alcohols 
B) ethers 
C) esters 
D) aldehydes 
E) ketones 
A) tertiary alcohols 
B) ethers 
C) esters 
D) aldehydes 
E) ketones

Question 6

Which pair of compounds would react to produce a polymer?

Accepted Answer

A) an acid and a diol 
B) a diacid and an alcohol 
C) a diacid and a diol 
D) an alcohol and an acid 
E) a diacid and a diketone 
A) an acid and a diol 
B) a diacid and an alcohol 
C) a diacid and a diol 
D) an alcohol and an acid 
E) a diacid and a diketone

Question 7

Which of the following statements is TRUE?

Accepted Answer

A) The SN2 mechanism does not have any intermediates and has only one transition state. 
B) Tertiary alkylchlorides are the best substrates for SN2 reactions. 
C) Only the strength of the nucleophile is important for SN2 reactions, not the nature of the leaving group. 
D) SN1 reactions have a carbanion as an intermediate. 
E) SN2 reactions result in the racemic product if we start from one enantiomer of a chiral substrate 
A) The SN2 mechanism does not have any intermediates and has only one transition state. 
B) Tertiary alkylchlorides are the best substrates for SN2 reactions. 
C) Only the strength of the nucleophile is important for SN2 reactions, not the nature of the leaving group. 
D) SN1 reactions have a carbanion as an intermediate. 
E) SN2 reactions result in the racemic product if we start from one enantiomer of a chiral substrate

Question 8

What is the product obtained after a reaction between a ketone and Grignard reagent is worked-up with dilute acid?

Accepted Answer

A) an aldehyde 
B) a primary alcohol 
C) a secondary alcohol 
D) a tertiary alcohol 
E) a carboxylic acid 
A) an aldehyde 
B) a primary alcohol 
C) a secondary alcohol 
D) a tertiary alcohol 
E) a carboxylic acid

Question 9

Predict the products of the following reaction: C5H11COOH + (COCl)2 →

Accepted Answer

A) C5H11Cl + HCl + CO + 2CO2 
B) C5H11COCl + H2O+ COCl + CO2 
C) C5H11COCl2 + 2H2CO3 
D) C5H11COCl + HCl + CO + CO2 
E) C5H11COCl + HCl + (CO)2 
A) C5H11Cl + HCl + CO + 2CO2 
B) C5H11COCl + H2O+ COCl + CO2 
C) C5H11COCl2 + 2H2CO3 
D) C5H11COCl + HCl + CO + CO2 
E) C5H11COCl + HCl + (CO)2

Question 10

What is transesterification?

Accepted Answer

A) Transesterification is a reaction that increases the oxidation number of carbon in esters. 
B) An acid-catalyzed conversion of one ester to another is called transesterification. 
C) Transesterification is a reaction in which the starting ester is transformed into any other organic family. 
D) An interconversion reaction sequence (carboxylic acid)→ (ester)→ (carbocylic acid)is called transesterification. 
E) A reaction that produces more reactive acyl compounds (such as acyl chlorides)from esters is called transesterification. 
A) Transesterification is a reaction that increases the oxidation number of carbon in esters. 
B) An acid-catalyzed conversion of one ester to another is called transesterification. 
C) Transesterification is a reaction in which the starting ester is transformed into any other organic family. 
D) An interconversion reaction sequence (carboxylic acid)→ (ester)→ (carbocylic acid)is called transesterification. 
E) A reaction that produces more reactive acyl compounds (such as acyl chlorides)from esters is called transesterification.

Question 11

Find the suitable reagent for the transformation:

Accepted Answer

A) NaBH4 
B) LiAlH4 
C) Pd/H2 
D) NaH 
E) Pd/C 
A) NaBH4 
B) LiAlH4 
C) Pd/H2 
D) NaH 
E) Pd/C

Question 12

Which of the following statements is TRUE?

Accepted Answer

A) H-X molecules add across C=C bonds with retention of absolute configuration. 
B) The addition of H-X molecules to alkenes and alkynes is a one-step mechanism. 
C) The rate of H-X addition depends strongly on the nature of the leaving group. 
D) According to Markovnikov's rule, the hydrogen cation adds to the C=C bond in such a way as to generate the most stable carbocation. 
E) The hydrogen cation adds to the more substituted carbon atom of the C=C bond, a fact known as the Markovnikov's rule. 
A) H-X molecules add across C=C bonds with retention of absolute configuration. 
B) The addition of H-X molecules to alkenes and alkynes is a one-step mechanism. 
C) The rate of H-X addition depends strongly on the nature of the leaving group. 
D) According to Markovnikov's rule, the hydrogen cation adds to the C=C bond in such a way as to generate the most stable carbocation. 
E) The hydrogen cation adds to the more substituted carbon atom of the C=C bond, a fact known as the Markovnikov's rule.

Question 13

Which of the following is the product of the following reaction?

Accepted Answer

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

Question 14

Arrange the following in order from most oxidized to least oxidized.

Accepted Answer

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

Question 15

Match the following.

-a type of polymer formation mechanism

Accepted Answer

A) substitution at saturated carbon atom, mechanism 
B) LiAlH4 
C) H+ 
D) step-growth 
E) elimination reaction mechanism
F)Jones reagent
G)hemiketal
H)methoxide
I)CN- 
A) substitution at saturated carbon atom, mechanism 
B) LiAlH4 
C) H+ 
D) step-growth 
E) elimination reaction mechanism
F)Jones reagent
G)hemiketal
H)methoxide
I)CN-

Question 16

What is a hemiacetal?

Accepted Answer

A) A hemiacetal, prepared from an alcohol and an aldehyde, is a compound that contains both OH and OR groups on the same carbon. 
B) Compounds prepared from ketones and alcohols and with OH and OR groups on the same carbon are known as hemiacetals. 
C) A hemiacetal is a product of acetyl group hydrolysis; it contains a COOH group. 
D) A hemiacetal is formed from alcohols and acetic acid; a hemiacetal has both acetyl and OH groups on the same carbon atom. 
E) A hemiacetal, formed from an aldehyde and an alcohol, has OH and aldehyde groups on adjacent carbon atoms in its structure. 
A) A hemiacetal, prepared from an alcohol and an aldehyde, is a compound that contains both OH and OR groups on the same carbon. 
B) Compounds prepared from ketones and alcohols and with OH and OR groups on the same carbon are known as hemiacetals. 
C) A hemiacetal is a product of acetyl group hydrolysis; it contains a COOH group. 
D) A hemiacetal is formed from alcohols and acetic acid; a hemiacetal has both acetyl and OH groups on the same carbon atom. 
E) A hemiacetal, formed from an aldehyde and an alcohol, has OH and aldehyde groups on adjacent carbon atoms in its structure.

Question 17

Match the following.

-formed from a ketone and alcohol

Accepted Answer

A) substitution at saturated carbon atom, mechanism 
B) LiAlH4 
C) H+ 
D) step-growth 
E) elimination reaction mechanism
F)Jones reagent
G)hemiketal
H)methoxide
I)CN- 
A) substitution at saturated carbon atom, mechanism 
B) LiAlH4 
C) H+ 
D) step-growth 
E) elimination reaction mechanism
F)Jones reagent
G)hemiketal
H)methoxide
I)CN-

Question 18

Why doesn't benzene typically undergo addition reactions like the alkenes do?

Accepted Answer

Benzene's pi electrons are del

Question 19

In which of the following families would the strongest organic bases be found?

Accepted Answer

A) amines 
B) ethers 
C) esters 
D) alcohols 
E) ketones 
A) amines 
B) ethers 
C) esters 
D) alcohols 
E) ketones

Question 20

Which of the following statements is TRUE?

Accepted Answer

A) Dehydration is an example of a 1,2-elimination reaction in which an alcohol loses one water molecule, forming an alkene. 
B) Dehydrohalogenation is an example of a 1,2 elimination reaction in which an organic molecule loses one water molecule and a halogen atom to produce an alkyne. 
C) There is only one possible mechanistic pathway for an elimination reaction, called the E1 mechanism. 
D) 1,2-elimination reactions are frequently in competition with addition reactions. 
E) Dehydration and dehydrohalogenation are two distinct steps in every 1,2-elimination reaction. 
A) Dehydration is an example of a 1,2-elimination reaction in which an alcohol loses one water molecule, forming an alkene. 
B) Dehydrohalogenation is an example of a 1,2 elimination reaction in which an organic molecule loses one water molecule and a halogen atom to produce an alkyne. 
C) There is only one possible mechanistic pathway for an elimination reaction, called the E1 mechanism. 
D) 1,2-elimination reactions are frequently in competition with addition reactions. 
E) Dehydration and dehydrohalogenation are two distinct steps in every 1,2-elimination reaction.

Exam 21: Organic Chemistry II: Reactions

Choose the weak base from the compounds below.

Determine the products of the following reaction: Benzene + CH3CH2Cl ?

What are the correct products of the following reaction performed in the presence of an acid? C3H7COOCH3 + C2H5OH →

Which of the following compounds is a Grignard reagent?

What are secondary alcohols oxidized to?

Which pair of compounds would react to produce a polymer?

Which of the following statements is TRUE?

What is the product obtained after a reaction between a ketone and Grignard reagent is worked-up with dilute acid?

Predict the products of the following reaction: C5H11COOH + (COCl)2 →

What is transesterification?

Find the suitable reagent for the transformation:

Which of the following statements is TRUE?

Which of the following is the product of the following reaction?

Arrange the following in order from most oxidized to least oxidized.

Match the following. -a type of polymer formation mechanism

What is a hemiacetal?

Match the following. -formed from a ketone and alcohol

Why doesn't benzene typically undergo addition reactions like the alkenes do?

In which of the following families would the strongest organic bases be found?

Which of the following statements is TRUE?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Biochemistry

Chemistry of the Nonmetals

Metals and Metallury

Transition Metals and Coordination Compounds

Filters

Determine the products of the following reaction: Benzene + CH₃CH₂Cl ?

What are the correct products of the following reaction performed in the presence of an acid? C₃H₇COOCH₃ + C₂H₅OH →

Predict the products of the following reaction: C₅H₁₁COOH + (COCl)₂ →