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CHEM219 / CHEM 219 Complete
Course Bundle | Modules 5 & 6
Exam
Principles of Organic Chemistry with Lab
| Portage Learning |
Verified Questions & Answers
Module 5: Alcohols, Phenols, and Related Compounds Question 1
Name each of the following alcohols using IUPAC systematic
nomenclature methodology:
A. Structure with OH on carbon 1 of a 3-carbon chain with a methyl on
carbon 2
B. Cyclic 5-carbon ring with OH attached
C. 4-carbon chain with double bond between carbons 2-3 and OH on
carbon 1
D. Benzene ring with OH and two nitro groups at positions 3 and 5
Answer:
,2
A. 2-methyl-1-propanol (or 2-methylpropan-1-ol)
B. Cyclopentanol
C. 2-buten-1-ol (or E-2-buten-1-ol)
D. 3,5-dinitrophenol
Rationale: Alcohol nomenclature requires identifying the parent chain
containing the OH group, numbering to give the OH the lowest possible
number, and using the -ol suffix. For phenols, the OH is assumed at
position 1 on the benzene ring .
Question 2
Classify each of the following alcohols as primary, secondary, or
tertiary:
A. CH₃CH₂CH₂OH
B. (CH₃)₂CHCH₂OH
C. CH₃CH(OH)CH₃
D. (CH₃)₃COH
Answer:
A. Primary
B. Primary
C. Secondary
D. Tertiary
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Rationale: A primary alcohol has the OH attached to a carbon bonded
to only one other carbon. Secondary has the OH carbon bonded to two
carbons. Tertiary has the OH carbon bonded to three carbons .
Question 3
What is the functional group in an alcohol?
A. –COOH
B. –OH
C. –NH₂
D. –CHO
Answer: B. –OH
Rationale: Alcohols contain a hydroxyl (–OH) group bonded to a
saturated carbon atom .
Question 4
Which of the following is a primary alcohol?
A. CH₃CH₂OH
B. (CH₃)₂CHOH
C. CH₃CH₂CH₂OH
D. Both A and C
, 4
Answer: D. Both A and C
Rationale: Both ethanol (CH₃CH₂OH) and 1-propanol (CH₃CH₂CH₂OH)
have the OH group attached to a carbon that is bonded to only one
other carbon, making them primary alcohols .
Question 5
Alcohols can act as weak acids or weak bases depending on their
environment. This property is called:
A. Isomerism
B. Amphoteric
C. Catenation
D. Hybridization
Answer: B. Amphoteric
Rationale: Alcohols are amphoteric substances because they can act as
weak acids (donating the O-H proton as H⁺) or as weak bases (accepting
H⁺ using a lone pair on the oxygen atom) depending on the surrounding
environment .
Question 6
The product formed when a primary alcohol is oxidized is initially a(n):
A. Ketone
CHEM219 / CHEM 219 Complete
Course Bundle | Modules 5 & 6
Exam
Principles of Organic Chemistry with Lab
| Portage Learning |
Verified Questions & Answers
Module 5: Alcohols, Phenols, and Related Compounds Question 1
Name each of the following alcohols using IUPAC systematic
nomenclature methodology:
A. Structure with OH on carbon 1 of a 3-carbon chain with a methyl on
carbon 2
B. Cyclic 5-carbon ring with OH attached
C. 4-carbon chain with double bond between carbons 2-3 and OH on
carbon 1
D. Benzene ring with OH and two nitro groups at positions 3 and 5
Answer:
,2
A. 2-methyl-1-propanol (or 2-methylpropan-1-ol)
B. Cyclopentanol
C. 2-buten-1-ol (or E-2-buten-1-ol)
D. 3,5-dinitrophenol
Rationale: Alcohol nomenclature requires identifying the parent chain
containing the OH group, numbering to give the OH the lowest possible
number, and using the -ol suffix. For phenols, the OH is assumed at
position 1 on the benzene ring .
Question 2
Classify each of the following alcohols as primary, secondary, or
tertiary:
A. CH₃CH₂CH₂OH
B. (CH₃)₂CHCH₂OH
C. CH₃CH(OH)CH₃
D. (CH₃)₃COH
Answer:
A. Primary
B. Primary
C. Secondary
D. Tertiary
,3
Rationale: A primary alcohol has the OH attached to a carbon bonded
to only one other carbon. Secondary has the OH carbon bonded to two
carbons. Tertiary has the OH carbon bonded to three carbons .
Question 3
What is the functional group in an alcohol?
A. –COOH
B. –OH
C. –NH₂
D. –CHO
Answer: B. –OH
Rationale: Alcohols contain a hydroxyl (–OH) group bonded to a
saturated carbon atom .
Question 4
Which of the following is a primary alcohol?
A. CH₃CH₂OH
B. (CH₃)₂CHOH
C. CH₃CH₂CH₂OH
D. Both A and C
, 4
Answer: D. Both A and C
Rationale: Both ethanol (CH₃CH₂OH) and 1-propanol (CH₃CH₂CH₂OH)
have the OH group attached to a carbon that is bonded to only one
other carbon, making them primary alcohols .
Question 5
Alcohols can act as weak acids or weak bases depending on their
environment. This property is called:
A. Isomerism
B. Amphoteric
C. Catenation
D. Hybridization
Answer: B. Amphoteric
Rationale: Alcohols are amphoteric substances because they can act as
weak acids (donating the O-H proton as H⁺) or as weak bases (accepting
H⁺ using a lone pair on the oxygen atom) depending on the surrounding
environment .
Question 6
The product formed when a primary alcohol is oxidized is initially a(n):
A. Ketone
