Question 1

Including cis-trans stereoisomers, how many enol tautomers are possible for the following ketone?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4 C

Question 2

How many different ketones have the molecular formula C5H10O?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4 C

Question 3

What is the smallest number of carbon atoms that can be present in an aldehyde?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4 A

Question 4

Which of the following has the lowest boiling point?

Accepted Answer

A)  butane 
B)  propanal 
C)  ethyl methyl ether 
D)  1-propanol 
A)  butane 
B)  propanal 
C)  ethyl methyl ether 
D)  1-propanol

Question 5

What is the minimum number of oxygen atoms present in an acetal?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
A)  0 
B)  1 
C)  2 
D)  3

Question 6

Which of the following is true of ketones?

Accepted Answer

A)  Most ketones are odorless. 
B)  Most ketones have mild odors. 
C)  Most ketones have strong pleasant odors. 
D)  Most ketones have strong unpleasant odors. 
A)  Most ketones are odorless. 
B)  Most ketones have mild odors. 
C)  Most ketones have strong pleasant odors. 
D)  Most ketones have strong unpleasant odors.

Question 7

What is the IUPAC name for the following compound?

Accepted Answer

A)  1-pentaldehyde 
B)  1-pentanal 
C)  pentanal 
D)  pentanealdehyde 
A)  1-pentaldehyde 
B)  1-pentanal 
C)  pentanal 
D)  pentanealdehyde

Question 8

Which of the following is obtained by the reaction of 2-butanone with H2 in the presence of a transition metal catalyst?

Accepted Answer

A)  1-butene 
B)  2-butene 
C)  1-butanol 
D)  2-butanol 
A)  1-butene 
B)  2-butene 
C)  1-butanol 
D)  2-butanol

Question 9

Which of the following is a correct IUPAC name?

Accepted Answer

A)  1-methylpropanal 
B)  2-ethylpropanal 
C)  2,2-dimethylpropanal 
D)  none of these 
A)  1-methylpropanal 
B)  2-ethylpropanal 
C)  2,2-dimethylpropanal 
D)  none of these

Question 10

If pairs of enantiomers are only counted once, how many aldehydes with the molecular formula C5H10O are chiral?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
A)  0 
B)  1 
C)  2 
D)  3

Question 11

Examine the following structure.   In order to convert this substance to the corresponding alcohol, which reagent(s) should be used?

Accepted Answer

A)  H2/Pd 
B)  NaBH4 
C)  K2Cr2O7 /H2SO4 
D)  AgNO3 / NH3 
E)  either a or b 
A)  H2/Pd 
B)  NaBH4 
C)  K2Cr2O7 /H2SO4 
D)  AgNO3 / NH3 
E)  either a or b

Question 12

Which of the following can undergo keto-enol tautomerism?

Accepted Answer

A)  2,4-dimethyl-3-pentanone 
B)  2,2,4,4-tetramethyl-3-pentanone 
C)  both a and b 
D)  neither a nor b 
A)  2,4-dimethyl-3-pentanone 
B)  2,2,4,4-tetramethyl-3-pentanone 
C)  both a and b 
D)  neither a nor b

Question 13

What is the IUPAC name of the following compound?

Accepted Answer

A)  1,1-dimethyl-3-pentanone 
B)  3,3-dimethyl-1-pentanone 
C)  3,3-dimethylcyclopentanone 
D)  1,1-dimethyl-3-cyclopentanone 
A)  1,1-dimethyl-3-pentanone 
B)  3,3-dimethyl-1-pentanone 
C)  3,3-dimethylcyclopentanone 
D)  1,1-dimethyl-3-cyclopentanone

Question 14

Which product will be formed by treatment of the following compound with silver nitrate and ammonia in water, followed by acidification with HCl?

Accepted Answer

A)    
B)    
C)    
D)  None of these products would be formed. 
A)    
B)    
C)    
D)  None of these products would be formed.

Question 15

Which of the following compounds gives 1-pentanol upon reduction with H2/metal catalyst?

Accepted Answer

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

Question 16

Which of the following will be obtained by the reaction of pentanal with H2 in the presence of a transition metal catalyst?

Accepted Answer

A)  pentene 
B)  1-pentanol 
C)  2-pentanol 
D)  pentanoic acid 
A)  pentene 
B)  1-pentanol 
C)  2-pentanol 
D)  pentanoic acid

Question 17

Which of the following has the highest boiling point?

Accepted Answer

A)  2-butanone 
B)  2-heptanone 
C)  2-hexanone 
D)  2-pentanone 
A)  2-butanone 
B)  2-heptanone 
C)  2-hexanone 
D)  2-pentanone

Question 18

What is the smallest number of carbon atoms that can be present in a ketone?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 19

What is the IUPAC name for the following compound?

Accepted Answer

A)  2,4-dimethyl-6-hexanal 
B)  2-aldehydomethyl-4-methylpentane 
C)  3,5-dimethyl-1-hexanal 
D)  3,5-dimethylhexanal 
A)  2,4-dimethyl-6-hexanal 
B)  2-aldehydomethyl-4-methylpentane 
C)  3,5-dimethyl-1-hexanal 
D)  3,5-dimethylhexanal

Question 20

Which of the following compounds contain a hemiacetal functional group?

Accepted Answer

A)  Α and B 
B)  Β and C 
C)  B only 
D)  C only 
A)  Α and B 
B)  Β and C 
C)  B only 
D)  C only

Exam 17: Aldehydes and Ketones

Including cis-trans stereoisomers, how many enol tautomers are possible for the following ketone?

How many different ketones have the molecular formula C5H10O?

What is the smallest number of carbon atoms that can be present in an aldehyde?

Which of the following has the lowest boiling point?

What is the minimum number of oxygen atoms present in an acetal?

Which of the following is true of ketones?

What is the IUPAC name for the following compound?

Which of the following is obtained by the reaction of 2-butanone with H2 in the presence of a transition metal catalyst?

Which of the following is a correct IUPAC name?

If pairs of enantiomers are only counted once, how many aldehydes with the molecular formula C5H10O are chiral?

Examine the following structure. In order to convert this substance to the corresponding alcohol, which reagent(s) should be used?

Which of the following can undergo keto-enol tautomerism?

What is the IUPAC name of the following compound?

Which product will be formed by treatment of the following compound with silver nitrate and ammonia in water, followed by acidification with HCl?

Which of the following compounds gives 1-pentanol upon reduction with H2/metal catalyst?

Which of the following will be obtained by the reaction of pentanal with H2 in the presence of a transition metal catalyst?

Which of the following has the highest boiling point?

What is the smallest number of carbon atoms that can be present in a ketone?

What is the IUPAC name for the following compound?

Which of the following compounds contain a hemiacetal functional group?

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Filters

How many different ketones have the molecular formula C₅H₁₀O?

Which of the following is obtained by the reaction of 2-butanone with H₂ in the presence of a transition metal catalyst?

If pairs of enantiomers are only counted once, how many aldehydes with the molecular formula C₅H₁₀O are chiral?

Which of the following compounds gives 1-pentanol upon reduction with H₂/metal catalyst?

Which of the following will be obtained by the reaction of pentanal with H₂ in the presence of a transition metal catalyst?