Question 1

What is the direction of equilibrium when acetylene (C2H2)reacts with H2N- in an acid-base reaction?

Accepted Answer

A) Left 
B) Right 
C) Neither 
D) Cannot be determined 
A) Left 
B) Right 
C) Neither 
D) Cannot be determined B

Question 2

Rank the following conjugate bases in order of decreasing basicity,putting the most basic first.

Accepted Answer

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

Question 3

What is the role of methylchloride (CH3Cl)in the following reaction?

Accepted Answer

A) Lewis acid 
B) Lewis base 
C) Brønsted-Lowry acid 
D) Brønsted-Lowry base 
A) Lewis acid 
B) Lewis base 
C) Brønsted-Lowry acid 
D) Brønsted-Lowry base B

Question 4

Which is the conjugate acid in the following reaction?

Accepted Answer

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

Question 5

What is the conjugate base of HSO4-? SO42- H2SO4 SO3 H2O
I II III IV

Accepted Answer

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

Question 6

Which of the following is the strongest base?

Accepted Answer

A) CH3COCH3 
B) CH3COOH 
C) NH3 
D) H2O 
A) CH3COCH3 
B) CH3COOH 
C) NH3 
D) H2O

Question 7

What is the correct rank of the following compounds in order of increasing acidity?

Accepted Answer

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

Question 8

What is the nucleophilic site in the following compounds?

Accepted Answer

A) I = Hydrogen; II = π electrons in bond; III = nitrogen. 
B) I = Oxygen; II = carbon; III = nitrogen. 
C) I = Hydrogen; II = carbon; III = carbon. 
D) I = Oxygen; II = π electrons in bond; III = nitrogen. 
A) I = Hydrogen; II = π electrons in bond; III = nitrogen. 
B) I = Oxygen; II = carbon; III = nitrogen. 
C) I = Hydrogen; II = carbon; III = carbon. 
D) I = Oxygen; II = π electrons in bond; III = nitrogen.

Question 9

Which of the following species cannot act as both a Brønsted-Lowry acid and base?

Accepted Answer

A) HCO3- 
B) HSO4- 
C) HO- 
D) H2PO4- 
A) HCO3- 
B) HSO4- 
C) HO- 
D) H2PO4-

Question 10

Identify the Lewis base in the following reaction.

Accepted Answer

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

Question 11

Which of the following compounds is the strongest acid?

Accepted Answer

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

Question 12

Identify the base/conjugate base (in that order)in the following reaction:

Accepted Answer

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

Question 13

Which of the following will proceed as written?

Accepted Answer

A) CH3ONa + HCl → CH3OH + NaCl 
B) CH3OH + NaCl → NaOEt + HCl 
C) CH3OH + H2O → CH3O- + H3O+ 
D) CH3OH + NH3 → CH3O- + NH4± 
A) CH3ONa + HCl → CH3OH + NaCl 
B) CH3OH + NaCl → NaOEt + HCl 
C) CH3OH + H2O → CH3O- + H3O+ 
D) CH3OH + NH3 → CH3O- + NH4±

Question 14

Rank the following compounds in order of decreasing acidity,putting the most acidic first.

Accepted Answer

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

Question 15

What are the products of the following proton transfer reaction?

Accepted Answer

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

Question 16

What is the correct classification of the following compound? CH3-O-CH3

Accepted Answer

A) Brønsted-Lowry acid and Lewis acid 
B) Brønsted-Lowry base and Lewis base 
C) Brønsted-Lowry base 
D) Lewis base 
A) Brønsted-Lowry acid and Lewis acid 
B) Brønsted-Lowry base and Lewis base 
C) Brønsted-Lowry base 
D) Lewis base

Question 17

Which of the following compounds is both a Brønsted-Lowry acid and base?

Accepted Answer

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

Question 18

Which of the following compounds is the strongest acid?

Accepted Answer

A) CH3OH 
B) BrCH2OH 
C) CH3NH2 
D) CH3Cl 
A) CH3OH 
B) BrCH2OH 
C) CH3NH2 
D) CH3Cl

Question 19

Which of the following compounds is the weakest acid?

Accepted Answer

A) H2S 
B) PH3 
C) HCl 
D) SiH4 
A) H2S 
B) PH3 
C) HCl 
D) SiH4

Question 20

Which of the following is a Lewis acid but not a Brønsted-Lowry acid?

Accepted Answer

A) CH3OH 
B) H2O 
C) CH3COOH 
D) BF3 
A) CH3OH 
B) H2O 
C) CH3COOH 
D) BF3

Exam 2: Acids and Bases

What is the direction of equilibrium when acetylene (C2H2)reacts with H2N- in an acid-base reaction?

Rank the following conjugate bases in order of decreasing basicity,putting the most basic first.

What is the role of methylchloride (CH3Cl)in the following reaction?

Which is the conjugate acid in the following reaction?

What is the conjugate base of HSO4-? SO42- H2SO4 SO3 H2O I II III IV

Which of the following is the strongest base?

What is the correct rank of the following compounds in order of increasing acidity?

What is the nucleophilic site in the following compounds?

Which of the following species cannot act as both a Brønsted-Lowry acid and base?

Identify the Lewis base in the following reaction.

Which of the following compounds is the strongest acid?

Identify the base/conjugate base (in that order)in the following reaction:

Which of the following will proceed as written?

Rank the following compounds in order of decreasing acidity,putting the most acidic first.

What are the products of the following proton transfer reaction?

What is the correct classification of the following compound? CH3-O-CH3

Which of the following compounds is both a Brønsted-Lowry acid and base?

Which of the following compounds is the strongest acid?

Which of the following compounds is the weakest acid?

Which of the following is a Lewis acid but not a Brønsted-Lowry acid?

Structure and Bonding

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

Radical Reactions

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

Filters

What is the direction of equilibrium when acetylene (C₂H₂)reacts with H₂N^- in an acid-base reaction?

What is the role of methylchloride (CH₃Cl)in the following reaction?

What is the conjugate base of HSO₄^-? SO₄^2- H₂SO₄ SO₃ H₂O I II III IV

What is the correct classification of the following compound? CH₃-O-CH₃