Functional Groups and Nomenclature - Applications
Q. What is the correct IUPAC name for the compound CH3-CH(CH3)-CH2-CHO?
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A.
3-Methylbutanal
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B.
2-Methylbutanal
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C.
2-Butanal
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D.
3-Butanal
Solution
The longest carbon chain has four carbons, and the aldehyde is at the end, making it 2-methylbutanal.
Correct Answer: B — 2-Methylbutanal
Q. What is the IUPAC name for the compound CH3-CH2-COOH?
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A.
Propanoic acid
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B.
Butanoic acid
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C.
Acetic acid
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D.
Methanoic acid
Solution
The compound has three carbon atoms and a carboxylic acid functional group, making it propanoic acid.
Correct Answer: A — Propanoic acid
Q. What is the stereochemical configuration of 2-butene if the two methyl groups are on the same side?
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A.
Cis
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B.
Trans
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C.
R
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D.
S
Solution
When the two methyl groups are on the same side of the double bond, the configuration is referred to as cis.
Correct Answer: A — Cis
Q. What type of reaction occurs when an alcohol is converted to an alkene?
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A.
Hydration
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B.
Dehydration
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C.
Oxidation
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D.
Reduction
Solution
The conversion of an alcohol to an alkene involves the removal of water, which is a dehydration reaction.
Correct Answer: B — Dehydration
Q. Which of the following compounds is an ester?
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A.
CH3COOCH2CH3
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B.
CH3CHO
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C.
C2H5OH
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D.
CH3COOH
Solution
The compound CH3COOCH2CH3 contains an ester functional group, characterized by the -COO- linkage.
Correct Answer: A — CH3COOCH2CH3
Q. Which of the following is a characteristic functional group of alcohols?
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A.
-OH
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B.
-COOH
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C.
-NH2
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D.
-CHO
Solution
Alcohols contain a hydroxyl group (-OH) as their functional group.
Correct Answer: A — -OH
Q. Which of the following is the correct name for CH3-CH2-NH2?
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A.
Ethylamine
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B.
Ethanamine
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C.
Dimethylamine
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D.
Propylamine
Solution
The compound is an amine with two carbon atoms, and the correct IUPAC name is ethanamine.
Correct Answer: B — Ethanamine
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