Question 1

Many odors from solvents, paint removers, and perfumes are derived from aldehydes or ketones.

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

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

Question 3

A major flavor component of vanilla is an aldehyde.

Accepted Answer

A) True 
 B)False

Question 4

All aldehydes have a carbonyl carbon bonded to at least two hydrogens.

Accepted Answer

A) True 
 B)False

Question 5

What is the acetal formed when propanone reacts with two molecules of methanol?

Accepted Answer

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

Question 6

How many moles of an alcohol are needed to react with 1 mole of an aldehyde to form a hemiacetal?

Accepted Answer

A) 1 
B) 1.5 
C) 2 
D) 3 
E) 3.5 
A) 1 
B) 1.5 
C) 2 
D) 3 
E) 3.5

Question 7

Which of the following pairs of compounds are isomers?

Accepted Answer

A) CH₃CH2CH2OH and CH₃OCH₃ 
B)  
  
C) 
  
D)  
  
E) 
  
A) CH₃CH2CH2OH and CH₃OCH₃ 
B)  
  
C) 
  
D)  
  
E)

Question 8

Primary alcohols are oxidized to ketones.

Accepted Answer

A) True 
 B)False

Question 9

Glucose forms a cyclic hemiacetal.

Accepted Answer

A) True 
 B)False

Question 10

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 11

Enantiomers have superimposable mirror images.

Accepted Answer

A) True 
 B)False

Question 12

In all aldehydes except formaldehyde, how many hydrogen atoms is the carbonyl group bonded to?

Accepted Answer

A) one 
B) two 
C) three 
D) four 
A) one 
B) two 
C) three 
D) four

Question 13

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 14

Chirality occurs when stereoisomers have mirror images that are

Accepted Answer

A) superimposable. 
B) the same. 
C) not superimposable. 
D) not visible to one another. 
E) identical. 
A) superimposable. 
B) the same. 
C) not superimposable. 
D) not visible to one another. 
E) identical.

Question 15

What are the bond angles in a typical carbonyl group?

Accepted Answer

A) 45° 
B) 90° 
C) 109.5° 
D) 120° 
E) 135° 
A) 45° 
B) 90° 
C) 109.5° 
D) 120° 
E) 135°

Question 16

Enantiomers are mirror images of each other.

Accepted Answer

A) True 
 B)False

Question 17

How many lone pairs of electrons does the oxygen in a carbonyl group have?

Accepted Answer

A) None, they're all bonded. 
B) one 
C) two 
D) three 
E) four 
A) None, they're all bonded. 
B) one 
C) two 
D) three 
E) four

Question 18

The Tollens' test is used to distinguish between aldehydes and ketones.

Accepted Answer

A) True 
 B)False

Question 19

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 20

Hexanal would be soluble in water.

Accepted Answer

A) True 
 B)False

Exam 14: Aldehydes, Ketones, and Chiral Molecules

Many odors from solvents, paint removers, and perfumes are derived from aldehydes or ketones.

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

A major flavor component of vanilla is an aldehyde.

All aldehydes have a carbonyl carbon bonded to at least two hydrogens.

What is the acetal formed when propanone reacts with two molecules of methanol?

How many moles of an alcohol are needed to react with 1 mole of an aldehyde to form a hemiacetal?

Which of the following pairs of compounds are isomers?

Primary alcohols are oxidized to ketones.

Glucose forms a cyclic hemiacetal.

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

Enantiomers have superimposable mirror images.

In all aldehydes except formaldehyde, how many hydrogen atoms is the carbonyl group bonded to?

Use the structures below to answer:

Chirality occurs when stereoisomers have mirror images that are

What are the bond angles in a typical carbonyl group?

Enantiomers are mirror images of each other.

How many lone pairs of electrons does the oxygen in a carbonyl group have?

The Tollens' test is used to distinguish between aldehydes and ketones.

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

Hexanal would be soluble in water.

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