Question 1

The product of adding two molecules of an alcohol to an aldehyde in the presence of acid is a(n)

Accepted Answer

A)  acetal. 
B)  ether. 
C)  hemiacetal. 
D)  hemiether. 
E)  hydroxyl group. 
A)  acetal. 
B)  ether. 
C)  hemiacetal. 
D)  hemiether. 
E)  hydroxyl group.

Question 2

Aldehydes and ketones may be reduced to

Accepted Answer

A)  acids. 
B)  alkanes. 
C)  ethers. 
D)  alcohols. 
E)  esters. 
A)  acids. 
B)  alkanes. 
C)  ethers. 
D)  alcohols. 
E)  esters.

Question 3

The common name for 2-butanone, a readily available solvent, is

Accepted Answer

A)  methyl acetone. 
B)  methyl ethyl ketone or MEK. 
C)  β-butanone. 
D)  butyl ketone. 
E)  butyl ether. 
A)  methyl acetone. 
B)  methyl ethyl ketone or MEK. 
C)  β-butanone. 
D)  butyl ketone. 
E)  butyl ether.

Question 4

How many hydrogen atoms is the carbonyl group in a ketone bonded to?

Accepted Answer

A)  none 
B)  one 
C)  two 
D)  three 
E)  four 
A)  none 
B)  one 
C)  two 
D)  three 
E)  four

Question 5

An acetal is formed from an aldehyde or ketone and one molecule of alcohol.

Accepted Answer

A) True 
 B)False

Question 6

Benedict's test can be used to determine whether an α-hydroxyaldehyde functional group is present.

Accepted Answer

A) True 
 B)False

Question 7

Which of the compounds would give a positive Tollens test?

Accepted Answer

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

Question 8

Chiral drugs consist of only one enantiomer. The benefits of using a pure enantiomer, rather than a mixture, include

Accepted Answer

A)  higher potency (lower total dose of drug). 
B)  elimination of side effects. 
C)  reduced chances of drug interactions. 
D)  All of the above. 
E)  None of the above. 
A)  higher potency (lower total dose of drug). 
B)  elimination of side effects. 
C)  reduced chances of drug interactions. 
D)  All of the above. 
E)  None of the above.

Question 9

Excessive exposure to formaldehyde can irritate the eyes and respiratory tract.

Accepted Answer

A) True 
 B)False

Question 10

Formalin is

Accepted Answer

A)  another name for formaldehyde. 
B)  a plastic. 
C)  an aqueous solution of formaldehyde. 
D)  an excellent solvent. 
E)  a polymer. 
A)  another name for formaldehyde. 
B)  a plastic. 
C)  an aqueous solution of formaldehyde. 
D)  an excellent solvent. 
E)  a polymer.

Question 11

A major flavor component of vanilla is an aldehyde.

Accepted Answer

A) True 
 B)False

Question 12

The ketone with the constitutional formula C5H10O can also be written as

Accepted Answer

A)  CH3CH₂CH₂COCH3. 
B)  CH3COCH₂CH₂CH3. 
C)  CH3CH₂COCH₂CH3. 
D)  All of the above. 
E)  None of the above. 
A)  CH3CH₂CH₂COCH3. 
B)  CH3COCH₂CH₂CH3. 
C)  CH3CH₂COCH₂CH3. 
D)  All of the above. 
E)  None of the above.

Question 13

The addition of hydrogen to an organic compound or the loss of oxygen is called

Accepted Answer

A)  reduction. 
B)  oxidation. 
C)  dehydration. 
D)  halogenation. 
E)  hydration. 
A)  reduction. 
B)  oxidation. 
C)  dehydration. 
D)  halogenation. 
E)  hydration.

Question 14

The Tollens test is used to distinguish between aldehydes and acids.

Accepted Answer

A) True 
 B)False

Question 15

What is the IUPAC name for this compound?

Accepted Answer

A)  methyl aldehyde 
B)  1-ethanaldehyde 
C)  1-ethanone 
D)  ethanal 
E)  methanal 
A)  methyl aldehyde 
B)  1-ethanaldehyde 
C)  1-ethanone 
D)  ethanal 
E)  methanal

Question 16

The carbonyl group gives ketones lower boiling points than alkanes of similar mass.

Accepted Answer

A) True 
 B)False

Question 17

Hexanal would be soluble in water.

Accepted Answer

A) True 
 B)False

Question 18

The compound 2-propanone is also known as

Accepted Answer

A)  acetone. 
B)  2-propanone. 
C)  dimethyl ketone. 
D)  β-propanone. 
E)  propylone. 
A)  acetone. 
B)  2-propanone. 
C)  dimethyl ketone. 
D)  β-propanone. 
E)  propylone.

Question 19

The Tollens test may be used to distinguish

Accepted Answer

A)  acids from amines. 
B)  esters from acids. 
C)  ketones from alcohols. 
D)  aldehydes from ketones. 
E)  alcohols from alkenes. 
A)  acids from amines. 
B)  esters from acids. 
C)  ketones from alcohols. 
D)  aldehydes from ketones. 
E)  alcohols from alkenes.

Question 20

Aldehydes have higher boiling points than alkanes of similar mass because of

Accepted Answer

A)  hydrogen bonding. 
B)  dipole-dipole interactions. 
C)  ionic bonding. 
D)  covalent bonding. 
E)  oxygen bonding. 
A)  hydrogen bonding. 
B)  dipole-dipole interactions. 
C)  ionic bonding. 
D)  covalent bonding. 
E)  oxygen bonding.

Exam 14: Aldehydes, Ketones, and Chiral Molecules

The product of adding two molecules of an alcohol to an aldehyde in the presence of acid is a(n)

Aldehydes and ketones may be reduced to

The common name for 2-butanone, a readily available solvent, is

How many hydrogen atoms is the carbonyl group in a ketone bonded to?

An acetal is formed from an aldehyde or ketone and one molecule of alcohol.

Benedict's test can be used to determine whether an α-hydroxyaldehyde functional group is present.

Which of the compounds would give a positive Tollens test?

Chiral drugs consist of only one enantiomer. The benefits of using a pure enantiomer, rather than a mixture, include

Excessive exposure to formaldehyde can irritate the eyes and respiratory tract.

Formalin is

A major flavor component of vanilla is an aldehyde.

The ketone with the constitutional formula C5H10O can also be written as

The addition of hydrogen to an organic compound or the loss of oxygen is called

The Tollens test is used to distinguish between aldehydes and acids.

What is the IUPAC name for this compound?

The carbonyl group gives ketones lower boiling points than alkanes of similar mass.

Hexanal would be soluble in water.

The compound 2-propanone is also known as

The Tollens test may be used to distinguish

Aldehydes have higher boiling points than alkanes of similar mass because of

Chemistry and Measurements

Energy and Matter

Atoms and Elements

Nuclear Chemistry

Compounds and Their Bonds

Chemical Reactions and Quantities

Gases

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Introduction to Organic Chemistry: Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Phenols, Thiols, and Ethers

Carbohydrates

Carboxylic Acids and Esters

Lipids

Amines and Amides

Amino Acids and Proteins

Enzymes and Vitamins

Nucleic Acids and Protein Synthesis

Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Metabolic Pathways for Lipids and Amino Acids

Filters

The ketone with the constitutional formula C₅H₁₀O can also be written as