Q. What is the IUPAC name for the compound with the formula CH3-CH(CH3)-C(=O)-OH?
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A.
3-Hydroxybutanoic acid
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B.
2-Hydroxybutanoic acid
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C.
3-Hydroxypropanoic acid
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D.
2-Hydroxypropanoic acid
Solution
The compound has a hydroxyl group on the second carbon of a four-carbon chain with a carboxylic acid, making it 2-Hydroxybutanoic acid.
Correct Answer: B — 2-Hydroxybutanoic acid
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Q. What is the IUPAC name for the compound with the formula CH3-CH(CH3)-CH2-CHO?
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A.
3-Methylbutanal
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B.
2-Methylbutanal
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C.
4-Methylbutanal
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D.
Pentanal
Solution
The longest chain has 4 carbons with an aldehyde functional group, and a methyl group on the second carbon, hence 2-Methylbutanal.
Correct Answer: B — 2-Methylbutanal
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Q. What is the IUPAC name for the compound with the formula CH3-CH2-CH(CH3)-OH?
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A.
2-Propanol
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B.
2-Butanol
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C.
3-Butanol
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D.
1-Butanol
Solution
The longest chain has 4 carbons with an alcohol group on the second carbon, hence it is 2-Butanol.
Correct Answer: B — 2-Butanol
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Q. What is the IUPAC name for the compound with the formula CH3-CH2-CH2-CH2-COOH?
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A.
Pentanoic acid
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B.
Butanoic acid
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C.
Hexanoic acid
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D.
Heptanoic acid
Solution
The compound has a carboxylic acid functional group and five carbons, making it Pentanoic acid.
Correct Answer: A — Pentanoic acid
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Q. What is the IUPAC name for the compound with the formula CH3-CO-CH2-CH3?
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A.
Butan-2-one
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B.
Butan-1-one
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C.
Propan-2-one
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D.
Pentanal
Solution
The compound is a ketone with 4 carbons, and the carbonyl group is on the second carbon, making it Butan-2-one.
Correct Answer: A — Butan-2-one
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Q. What is the IUPAC name for the compound with the structure CH3-CH(CH3)-C(CH3)2-CH2-CH3?
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A.
2,3-Dimethylpentane
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B.
3,3-Dimethylpentane
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C.
2,2-Dimethylpentane
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D.
3-Methylpentane
Solution
The longest chain has 5 carbons, with two methyl groups on the third carbon, so the name is 3,3-Dimethylpentane.
Correct Answer: B — 3,3-Dimethylpentane
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Q. What is the IUPAC name for the compound with the structure CH3-CH(CH3)-C(CH3)2-COOH?
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A.
2-Methyl-3-pentanoic acid
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B.
3-Methyl-2-pentanoic acid
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C.
2,3-Dimethylbutanoic acid
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D.
3,3-Dimethylbutanoic acid
Solution
The compound has a carboxylic acid and two methyl groups on the third carbon, making it 3,3-Dimethylbutanoic acid.
Correct Answer: D — 3,3-Dimethylbutanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH(CH3)-CH2-CHO?
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A.
2-Methylbutanal
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B.
3-Methylbutanal
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C.
2-Butanal
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D.
3-Butanal
Solution
The longest chain has four carbons, and the aldehyde is at the end, making it 2-Methylbutanal.
Correct Answer: A — 2-Methylbutanal
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Q. What is the IUPAC name for the compound with the structure CH3-CH(CH3)-CH2-COOH?
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A.
2-Methylbutanoic acid
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B.
3-Methylbutanoic acid
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C.
2-Butenoic acid
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D.
3-Butenoic acid
Solution
The longest chain has four carbons, and the methyl group is on the second carbon, hence it is 2-Methylbutanoic acid.
Correct Answer: A — 2-Methylbutanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH(CH3)-C(=O)-OH?
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A.
3-Hydroxybutanoic acid
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B.
2-Hydroxybutanoic acid
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C.
3-Methylbutanoic acid
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D.
2-Methylbutanoic acid
Solution
The compound has a hydroxyl group on the second carbon of a four-carbon chain, making it 2-Hydroxybutanoic acid.
Correct Answer: B — 2-Hydroxybutanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH(CH3)-OH?
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A.
2-Propanol
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B.
1-Butanol
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C.
2-Butanol
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D.
3-Butanol
Solution
The longest chain has four carbons, and the hydroxyl group is on the second carbon, making it 2-Butanol.
Correct Answer: C — 2-Butanol
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CH2-COOH?
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A.
Hexanoic acid
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B.
Pentanoic acid
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C.
Heptanoic acid
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D.
Octanoic acid
Solution
The longest chain has six carbons, and the functional group is a carboxylic acid, hence the name is Hexanoic acid.
Correct Answer: A — Hexanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CH=CH2?
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A.
1-Hexene
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B.
2-Hexene
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C.
3-Hexene
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D.
Cyclohexene
Solution
The compound is an alkene with a double bond at the first carbon, named 1-Hexene.
Correct Answer: A — 1-Hexene
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-CHO?
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A.
Butanal
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B.
Pentanal
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C.
Hexanal
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D.
Heptanal
Solution
The longest chain has five carbons and ends with an aldehyde, hence it is Pentanal.
Correct Answer: B — Pentanal
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-CH2-COOH?
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A.
Pentanoic acid
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B.
Hexanoic acid
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C.
Butanoic acid
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D.
Heptanoic acid
Solution
The compound has a carboxylic acid functional group and a five-carbon chain, making it Pentanoic acid.
Correct Answer: A — Pentanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH2-COOH?
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A.
Butanoic acid
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B.
Propanoic acid
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C.
Pentanoic acid
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D.
Hexanoic acid
Solution
The compound has a carboxylic acid functional group and a four-carbon chain, making it Butanoic acid.
Correct Answer: A — Butanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CH=CH2?
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A.
1-Butene
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B.
2-Butene
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C.
Butyne
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D.
Butane
Solution
The compound has a double bond between the first and second carbons, making it 1-Butene.
Correct Answer: A — 1-Butene
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Q. What is the IUPAC name for the compound with the structure CH3-CH2-CO-CH3?
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A.
Butan-2-one
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B.
Propan-2-one
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C.
Butan-1-one
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D.
Pentanal
Solution
The compound is a ketone with four carbons and the carbonyl group on the second carbon, hence it is Butan-2-one.
Correct Answer: A — Butan-2-one
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Q. What is the IUPAC name for the compound with the structure 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 is a carboxylic acid with 3 carbons, named Propanoic acid.
Correct Answer: A — Propanoic acid
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Q. What is the IUPAC name for the compound with the structure CH3-CO-CH2-COOH?
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A.
3-Oxobutanoic acid
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B.
2-Oxobutanoic acid
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C.
Butanoic acid
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D.
Acetic acid
Solution
The compound has a ketone and a carboxylic acid, making it 3-Oxobutanoic acid.
Correct Answer: A — 3-Oxobutanoic acid
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Q. What is the IUPAC name of CH3-CH2-CH(CH3)-CH2-CH3?
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A.
2-Pentyl
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B.
3-Pentyl
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C.
2-Methylpentane
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D.
3-Methylpentane
Solution
The longest carbon chain has 5 carbons, and there is a methyl group on the second carbon, making it 2-Methylpentane.
Correct Answer: C — 2-Methylpentane
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Q. What is the IUPAC name of CH3-CH2-CH2-COOH?
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A.
Butanoic acid
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B.
Propanoic acid
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C.
Pentanoic acid
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D.
Hexanoic acid
Solution
The longest carbon chain contains four carbons, and the functional group is a carboxylic acid, hence the name is Butanoic acid.
Correct Answer: A — Butanoic acid
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Q. What is the IUPAC name of the compound with the formula C2H5-CO-CH3?
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A.
Butan-2-one
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B.
Propan-2-one
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C.
Butan-1-one
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D.
Propan-1-one
Solution
The compound is a ketone with four carbons, and the carbonyl group is on the second carbon, thus it is Butan-2-one.
Correct Answer: A — Butan-2-one
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Q. What is the IUPAC name of the compound with the formula C6H5-CH2-CHO?
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A.
Benzaldehyde
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B.
Benzylaldehyde
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C.
Phenylacetaldehyde
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D.
Phenylaldehyde
Solution
The compound has a benzyl group and an aldehyde functional group, making the correct name Benzylaldehyde.
Correct Answer: B — Benzylaldehyde
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Q. What is the IUPAC name of the compound with the structure CH3-CH(CH3)-C(CH3)2-CH2-CH3?
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A.
2,3-Dimethylpentane
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B.
3,3-Dimethylpentane
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C.
2,2-Dimethylpentane
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D.
3-Methylpentane
Solution
The longest chain has 5 carbons, and there are two methyl groups on the third carbon, so the name is 3,3-Dimethylpentane.
Correct Answer: B — 3,3-Dimethylpentane
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Q. Which of the following is the correct IUPAC name for C2H5-CO-CH3?
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A.
2-Pentanone
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B.
3-Pentanone
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C.
Butan-2-one
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D.
Butan-3-one
Solution
The compound is a ketone with a four-carbon chain, and the carbonyl group is on the second carbon, hence it is Butan-2-one.
Correct Answer: C — Butan-2-one
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Q. Which of the following is the correct IUPAC name for C3H6?
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A.
Propene
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B.
Cyclopropane
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C.
Propane
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D.
1-Propyn
Solution
C3H6 corresponds to propene, which is an alkene with a double bond.
Correct Answer: A — Propene
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Q. Which of the following is the correct IUPAC name for C3H7-COOH?
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A.
Propanoic acid
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B.
Butanoic acid
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C.
Pentanoic acid
-
D.
Hexanoic acid
Solution
The compound has 3 carbons in the longest chain and a carboxylic acid group, hence it is Propanoic acid.
Correct Answer: A — Propanoic acid
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Q. Which of the following is the correct IUPAC name for C5H10?
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A.
Pentane
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B.
Cyclopentane
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C.
1-Pentene
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D.
2-Pentene
Solution
C5H10 corresponds to pentane, which is a straight-chain alkane with 5 carbon atoms.
Correct Answer: A — Pentane
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Q. Which of the following is the correct IUPAC name for C6H12?
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A.
Hexane
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B.
Cyclohexane
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C.
2-Hexene
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D.
1-Hexyne
Solution
C6H12 is a straight-chain alkane with 6 carbons, which is named Hexane.
Correct Answer: A — Hexane
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