Question 1

Which one of the following compounds is an aldehyde?

Accepted Answer

A)  
  
B) 
  
C) CH₃- CH = CH - CH2 - CH₃ 
D) CH₃- CH2 - O - CH2 - CH₃ 
E) CH₃- SH 
A)  
  
B) 
  
C) CH₃- CH = CH - CH2 - CH₃ 
D) CH₃- CH2 - O - CH2 - CH₃ 
E) CH₃- SH

Question 2

1-butanol is a chiral molecule.

Accepted Answer

A) True 
 B)False

Question 3

Enantiomers may have very different tastes or smells.

Accepted Answer

A) True 
 B)False

Question 4

What is the name of this compound?

Accepted Answer

A) 2-methylbutanone 
B) 3-methyl-2-butanone 
C) 2-methyl-3-butanone 
D) 3-methylbutanone 
E) pentanone 
A) 2-methylbutanone 
B) 3-methyl-2-butanone 
C) 2-methyl-3-butanone 
D) 3-methylbutanone 
E) pentanone

Question 5

Low-molecular-weight ketones are soluble in water. What is the shortest length of the carbon chain where insolubility becomes important?

Accepted Answer

A) one 
B) two 
C) four 
D) five 
E) eight 
A) one 
B) two 
C) four 
D) five 
E) eight

Question 6

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 7

Formaldehyde is used in solution as a germicide and preservative.

Accepted Answer

A) True 
 B)False

Question 8

The flavoring agent found in vanilla is

Accepted Answer

A) an aldehyde. 
B) a ketone. 
C) a hydrocarbon. 
D) an ester. 
E) a thiol. 
A) an aldehyde. 
B) a ketone. 
C) a hydrocarbon. 
D) an ester. 
E) a thiol.

Question 9

Carbonyl compounds having fewer than four carbon atoms are very water soluble.

Accepted Answer

A) True 
 B)False

Question 10

How do sugars form cyclic hemiacetals?

Accepted Answer

A) Two molecules of a sugar react with one another. 
B) A molecule of sugar reacts with an added alcohol. 
C) A molecule of sugar reacts with itself. 
D) A molecule of sugar reacts with an added aldehyde. 
E) A sugar molecule decomposes. 
A) Two molecules of a sugar react with one another. 
B) A molecule of sugar reacts with an added alcohol. 
C) A molecule of sugar reacts with itself. 
D) A molecule of sugar reacts with an added aldehyde. 
E) A sugar molecule decomposes.

Question 11

Three functional groups found in this compound are

Accepted Answer

A) alcohol, aromatic, and ether. 
B) alcohol, aldehyde, and ether. 
C) alcohol, ether, and ketone. 
D) aldehyde, ether, and carboxylic acid. 
E) cycloalkene, alcohol, and carboxylic acid. 
A) alcohol, aromatic, and ether. 
B) alcohol, aldehyde, and ether. 
C) alcohol, ether, and ketone. 
D) aldehyde, ether, and carboxylic acid. 
E) cycloalkene, alcohol, and carboxylic acid.

Question 12

An enantiomer is

Accepted Answer

A) a stereoisomer that is not a mirror image of another molecule. 
B) a stereoisomer that is a mirror image of another molecule. 
C) a diastereoisomer. 
D) a structural isomer. 
E) a cis-trans isomer. 
A) a stereoisomer that is not a mirror image of another molecule. 
B) a stereoisomer that is a mirror image of another molecule. 
C) a diastereoisomer. 
D) a structural isomer. 
E) a cis-trans isomer.

Question 13

Acetone is a ketone commonly used as a

Accepted Answer

A) preservative. 
B) flavoring agent. 
C) fuel. 
D) solvent. 
E) drain cleaner. 
A) preservative. 
B) flavoring agent. 
C) fuel. 
D) solvent. 
E) drain cleaner.

Question 14

The carbonyl group does not have a dipole.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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 17

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 18

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.

Question 19

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 20

What is the IUPAC name for this compound?

Accepted Answer

A) methylcyclohexanone 
B) 2,5-dimethylcyclohexanone 
C) 1,4-dimethyl-2-cyclohexanone 
D) cyclohexyl methyl ketone 
E) 1,4-dimethyl-3-cyclohexanone 
A) methylcyclohexanone 
B) 2,5-dimethylcyclohexanone 
C) 1,4-dimethyl-2-cyclohexanone 
D) cyclohexyl methyl ketone 
E) 1,4-dimethyl-3-cyclohexanone

Exam 14: Aldehydes, Ketones, and Chiral Molecules

Which one of the following compounds is an aldehyde?

1-butanol is a chiral molecule.

Enantiomers may have very different tastes or smells.

What is the name of this compound?

Low-molecular-weight ketones are soluble in water. What is the shortest length of the carbon chain where insolubility becomes important?

The Tollens' test may be used to distinguish

Formaldehyde is used in solution as a germicide and preservative.

The flavoring agent found in vanilla is

Carbonyl compounds having fewer than four carbon atoms are very water soluble.

How do sugars form cyclic hemiacetals?

Three functional groups found in this compound are

An enantiomer is

Acetone is a ketone commonly used as a

The carbonyl group does not have a dipole.

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

The compound 2-propanone is also known as

Formalin is

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

Aldehydes and ketones may be reduced to

What is the IUPAC name for this compound?

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