Question 1

Which molecule is acetone?

Accepted Answer

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

Question 2

Which molecule is an aldehyde?

Accepted Answer

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

Question 3

Which of the following is formed in small amounts during the normal breakdown of carbohydrates?

Accepted Answer

A) formaldehyde 
B) benzaldehyde 
C) acetone 
D) acetaldehyde 
E) ethanol 
A) formaldehyde 
B) benzaldehyde 
C) acetone 
D) acetaldehyde 
E) ethanol

Question 4

All of the statements concerning the carbonyl group in aldehydes and ketones are true except

Accepted Answer

A) the bond is polar,with a slight negative charge on the oxygen atom. 
B) the bond angles about the central carbon atom are 120°. 
C) the carbonyl group is planar. 
D) in condensed form the carbonyl group can be written as -CHO. 
E) because the bond is polar,carbonyl groups readily form hydrogen bonds with each other. 
A) the bond is polar,with a slight negative charge on the oxygen atom. 
B) the bond angles about the central carbon atom are 120°. 
C) the carbonyl group is planar. 
D) in condensed form the carbonyl group can be written as -CHO. 
E) because the bond is polar,carbonyl groups readily form hydrogen bonds with each other.

Question 5

All of the following are true concerning a three-carbon ketone except

Accepted Answer

A) its condensed formula is C  
-CO-C
  
. 
B) its systematic name is propanone. 
C) its common name is acetone. 
D) another acceptable name is methyl ethyl ketone. 
E) its structural formula is:
  
A) its condensed formula is C  
-CO-C
  
. 
B) its systematic name is propanone. 
C) its common name is acetone. 
D) another acceptable name is methyl ethyl ketone. 
E) its structural formula is:

Question 6

Which molecule is formaldehyde?

Accepted Answer

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

Question 7

Reduction of an aldehyde produces a

Accepted Answer

A) carboxylic acid. 
B) primary alcohol. 
C) secondary alcohol. 
D) tertiary alcohol. 
E) ketone. 
A) carboxylic acid. 
B) primary alcohol. 
C) secondary alcohol. 
D) tertiary alcohol. 
E) ketone.

Question 8

Which of the following names does not fit a real compound?

Accepted Answer

A) 3-methyl-1-pentanone 
B) 2-methyl-3-pentanone 
C) 2-butanone 
D) 3-octanone 
E) All are correct. 
A) 3-methyl-1-pentanone 
B) 2-methyl-3-pentanone 
C) 2-butanone 
D) 3-octanone 
E) All are correct.

Question 9

Which compound has the lowest boiling point?

Accepted Answer

A) CH3CH2OH 
B) CH3CH2CHO 
C) CH3CH2CH3 
D) CH3CH2CH2OH 
E) CH3CH2CH2CH3 
A) CH3CH2OH 
B) CH3CH2CHO 
C) CH3CH2CH3 
D) CH3CH2CH2OH 
E) CH3CH2CH2CH3

Question 10

Match the following.
-aldehyde

Accepted Answer

A) a compound with a carbon atom that is bonded to both an alcohol-like group and an ether-like group. 
B) the simplest ketone,also named acetone 
C) a functional group consisting of a carbonyl group bonded to to a carbon that is bonded to one hydrogen atom and two other carbon atoms. 
D) the simplest aldehyde,also named formaldehyde 
E) a compound with a carbon atom that is bonded to two ether-like groups.
F)a functional group consisting of a carbon atom with a double bond to an oxygen atom
G) 
H)C   
C   
C   
C   
CHO
I)a functional group consisting of a carbonyl group bonded to two other carbon atoms
J)C   
C   
COC   
C  
K) 
L)  
A) a compound with a carbon atom that is bonded to both an alcohol-like group and an ether-like group. 
B) the simplest ketone,also named acetone 
C) a functional group consisting of a carbonyl group bonded to to a carbon that is bonded to one hydrogen atom and two other carbon atoms. 
D) the simplest aldehyde,also named formaldehyde 
E) a compound with a carbon atom that is bonded to two ether-like groups.
F)a functional group consisting of a carbon atom with a double bond to an oxygen atom
G) 
H)C   
C   
C   
C   
CHO
I)a functional group consisting of a carbonyl group bonded to two other carbon atoms
J)C   
C   
COC   
C  
K) 
L)

Question 11

Since hemiacetals are unstable,they are seldom found in significant quantities in reaction mixtures.An exception to this statement is the formation of hemiacetals

Accepted Answer

A) from carbonyl compounds and alcohols with identical R groups. 
B) from aldehyde and alcohol groups within the same molecule. 
C) from carbonyl compounds and alcohols with different R groups. 
D) in an acid-catalyzed reaction. 
E) in a base-catalyzed reaction. 
A) from carbonyl compounds and alcohols with identical R groups. 
B) from aldehyde and alcohol groups within the same molecule. 
C) from carbonyl compounds and alcohols with different R groups. 
D) in an acid-catalyzed reaction. 
E) in a base-catalyzed reaction.

Question 12

Which compound has the highest boiling point?

Accepted Answer

A) CH3CHO 
B) CH3CH2CHO 
C) CH3CH2OH 
D) CH3CH2CH2OH 
E) CH3COCH3 
A) CH3CHO 
B) CH3CH2CHO 
C) CH3CH2OH 
D) CH3CH2CH2OH 
E) CH3COCH3

Question 13

What is the IUPAC name for diisopropyl ketone?

Accepted Answer

A) 2,2-dimethyl-3-pentanone 
B) 2-dimethyl-3-pentanone 
C) 2,4-dimethyl-3-pentanone 
D) 2,4-dimethyl-3-propanone 
A) 2,2-dimethyl-3-pentanone 
B) 2-dimethyl-3-pentanone 
C) 2,4-dimethyl-3-pentanone 
D) 2,4-dimethyl-3-propanone

Question 14

Match the following.
-methanal

Accepted Answer

A) a compound with a carbon atom that is bonded to both an alcohol-like group and an ether-like group. 
B) the simplest ketone,also named acetone 
C) a functional group consisting of a carbonyl group bonded to to a carbon that is bonded to one hydrogen atom and two other carbon atoms. 
D) the simplest aldehyde,also named formaldehyde 
E) a compound with a carbon atom that is bonded to two ether-like groups.
F)a functional group consisting of a carbon atom with a double bond to an oxygen atom
G) 
H)C   
C   
C   
C   
CHO
I)a functional group consisting of a carbonyl group bonded to two other carbon atoms
J)C   
C   
COC   
C  
K) 
L)  
A) a compound with a carbon atom that is bonded to both an alcohol-like group and an ether-like group. 
B) the simplest ketone,also named acetone 
C) a functional group consisting of a carbonyl group bonded to to a carbon that is bonded to one hydrogen atom and two other carbon atoms. 
D) the simplest aldehyde,also named formaldehyde 
E) a compound with a carbon atom that is bonded to two ether-like groups.
F)a functional group consisting of a carbon atom with a double bond to an oxygen atom
G) 
H)C   
C   
C   
C   
CHO
I)a functional group consisting of a carbonyl group bonded to two other carbon atoms
J)C   
C   
COC   
C  
K) 
L)

Question 15

What is the element that causes oxidation in the Tollens' test for aldehydes?

Accepted Answer

A) silver 
B) copper 
C) gold 
D) platinum 
E) lead 
A) silver 
B) copper 
C) gold 
D) platinum 
E) lead

Question 16

Cyclize the following compound.Identify if it is a hemiacetal,hemiketal,acetal or ketal.

Accepted Answer

The answer of Cyclize the following compound.Identify if it is...

Question 17

Which compound will give a positive Tollens' test?

Accepted Answer

A) 2-pentanone 
B) 3-pentanone 
C) pentanoic acid 
D) pentane 
E) pentanal 
A) 2-pentanone 
B) 3-pentanone 
C) pentanoic acid 
D) pentane 
E) pentanal

Question 18

Which observation denotes a positive Benedict's test?

Accepted Answer

A) A red-brown solution becomes clear and colorless. 
B) A red precipitate forms from a blue solution. 
C) A purple solution yields a brown precipitate. 
D) A mirror-like deposit forms from a colorless solution. 
E) A pale yellow solution with an odor of chlorine changes to a purple color. 
A) A red-brown solution becomes clear and colorless. 
B) A red precipitate forms from a blue solution. 
C) A purple solution yields a brown precipitate. 
D) A mirror-like deposit forms from a colorless solution. 
E) A pale yellow solution with an odor of chlorine changes to a purple color.

Question 19

Which molecule is 2-butanone?

Accepted Answer

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

Question 20

Which is the correct systematic name for the molecule shown?

Accepted Answer

A) methyl propyl ketone 
B) propyl methyl ketone 
C) ethyl methyl acetone 
D) 3-hexanone 
E) 4-hexanone 
A) methyl propyl ketone 
B) propyl methyl ketone 
C) ethyl methyl acetone 
D) 3-hexanone 
E) 4-hexanone

Exam 15: Aldehydes and Ketones

Which molecule is acetone?

Which molecule is an aldehyde?

Which of the following is formed in small amounts during the normal breakdown of carbohydrates?

All of the statements concerning the carbonyl group in aldehydes and ketones are true except

All of the following are true concerning a three-carbon ketone except

Which molecule is formaldehyde?

Reduction of an aldehyde produces a

Which of the following names does not fit a real compound?

Which compound has the lowest boiling point?

Match the following. -aldehyde

Since hemiacetals are unstable,they are seldom found in significant quantities in reaction mixtures.An exception to this statement is the formation of hemiacetals

Which compound has the highest boiling point?

What is the IUPAC name for diisopropyl ketone?

Match the following. -methanal

What is the element that causes oxidation in the Tollens' test for aldehydes?

Cyclize the following compound.Identify if it is a hemiacetal,hemiketal,acetal or ketal.

Which compound will give a positive Tollens' test?

Which observation denotes a positive Benedict's test?

Which molecule is 2-butanone?

Which is the correct systematic name for the molecule shown?

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

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