Question 1

Achiral compounds are those which

Accepted Answer

A) have no "handedness." 
B) have different mirror images. 
C) are non-superimposable. 
D) have the same formula but different structures. 
E) are a racemic mixture. 
A) have no "handedness." 
B) have different mirror images. 
C) are non-superimposable. 
D) have the same formula but different structures. 
E) are a racemic mixture.

Question 2

The biological activity of one of a set of enantiomers may be very different from the biological activity of the other optical isomers.

Accepted Answer

A) True 
 B)False

Question 3

A hemiacetal has alkoxy and hydroxyl functional groups bonded to the same carbon.

Accepted Answer

A) True 
 B)False

Question 4

The increased boiling point of ketones compared to alkanes and ethers of similar mass is due to

Accepted Answer

A) hydrogen bonding. 
B) dipole-dipole interactions. 
C) a bent chain structure. 
D) resonance. 
E) ionic interactions. 
A) hydrogen bonding. 
B) dipole-dipole interactions. 
C) a bent chain structure. 
D) resonance. 
E) ionic interactions.

Question 5

Which of the following ketones is the most soluble in water?

Accepted Answer

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

Question 6

In a ketone, the carbonyl group is bonded to two other carbon atoms.

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

Which of these compounds is the hemiacetal that forms when ethanol reacts with propanal?

Accepted Answer

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

Question 9

A chiral carbon atom can have fewer than four different groups bonded to it.

Accepted Answer

A) True 
 B)False

Question 10

What is the name of this compound?

Accepted Answer

A) 2-pentanone 
B) methyl propyl ketone 
C) 3-methyl-2-butanone 
D) 2-methyl-3-butanone 
E) 2-methyl-3-ketone butane 
A) 2-pentanone 
B) methyl propyl ketone 
C) 3-methyl-2-butanone 
D) 2-methyl-3-butanone 
E) 2-methyl-3-ketone butane

Question 11

Acetone is sometimes produced in pathological conditions such as diabetes.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following compounds contains a ketone functional group?

Accepted Answer

A)  
  
B)  
  
C) CH₃- CH2 - O - CH2 -CH₃ 
D)  
  
E) 
  
A)  
  
B)  
  
C) CH₃- CH2 - O - CH2 -CH₃ 
D)  
  
E)

Question 13

Acetone would give a positive Tollens' test.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following would not be water soluble?

Accepted Answer

A) acetone 
B) propanal 
C) 3-heptanone 
D) formaldehyde 
E) 2-butanone 
A) acetone 
B) propanal 
C) 3-heptanone 
D) formaldehyde 
E) 2-butanone

Question 15

Ketones are reduced to secondary alcohols.

Accepted Answer

A) True 
 B)False

Question 16

The suffix -al indicates an aldehyde in the IUPAC system of naming.

Accepted Answer

A) True 
 B)False

Question 17

Benedict's test requires an aldehyde and an adjacent

Accepted Answer

A) saturated carbon. 
B) ketone. 
C) alcohol. 
D) phenyl ring. 
E) acid. 
A) saturated carbon. 
B) ketone. 
C) alcohol. 
D) phenyl ring. 
E) acid.

Question 18

How many different substituents are required on a carbon atom for it to be chiral?

Accepted Answer

A) one 
B) two 
C) three 
D) four 
E) Any number from 1 to 4; chiralty does not depend on substitution. 
A) one 
B) two 
C) three 
D) four 
E) Any number from 1 to 4; chiralty does not depend on substitution.

Question 19

Use the structures below to answer:

Accepted Answer

A)  A is chiral and B is achiral 
B)  A is achiral and B is chiral 
C)  both A and B are chiral 
D)  both A and B are achiral 
A)  A is chiral and B is achiral 
B)  A is achiral and B is chiral 
C)  both A and B are chiral 
D)  both A and B are achiral

Question 20

The reduction of 3-pentanone with hydrogen in the presence of a nickel catalyst will yield

Accepted Answer

A) pentane. 
B) 2-pentene. 
C) diethyl alcohol. 
D) 3-pentanol. 
E) pentanaldehyde. 
A) pentane. 
B) 2-pentene. 
C) diethyl alcohol. 
D) 3-pentanol. 
E) pentanaldehyde.

Exam 14: Aldehydes, Ketones, and Chiral Molecules

Achiral compounds are those which

The biological activity of one of a set of enantiomers may be very different from the biological activity of the other optical isomers.

A hemiacetal has alkoxy and hydroxyl functional groups bonded to the same carbon.

The increased boiling point of ketones compared to alkanes and ethers of similar mass is due to

Which of the following ketones is the most soluble in water?

In a ketone, the carbonyl group is bonded to two other carbon atoms.

Which of the compounds would give a positive Tollens' test?

Which of these compounds is the hemiacetal that forms when ethanol reacts with propanal?

A chiral carbon atom can have fewer than four different groups bonded to it.

What is the name of this compound?

Acetone is sometimes produced in pathological conditions such as diabetes.

Which of the following compounds contains a ketone functional group?

Acetone would give a positive Tollens' test.

Which of the following would not be water soluble?

Ketones are reduced to secondary alcohols.

The suffix -al indicates an aldehyde in the IUPAC system of naming.

Benedict's test requires an aldehyde and an adjacent

How many different substituents are required on a carbon atom for it to be chiral?

Use the structures below to answer:

The reduction of 3-pentanone with hydrogen in the presence of a nickel catalyst will yield

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