Q. Identify the IUPAC name for the compound with the structure CH3-CH(CH3)-C(CH3)2-COOH.
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A.
3-Methylbutanoic acid
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B.
2-Methylbutanoic acid
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C.
3,3-Dimethylbutanoic acid
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D.
2,3-Dimethylbutanoic acid
Solution
The compound has a carboxylic acid group and a total of 5 carbons with two methyl groups on the third carbon, making it 3,3-Dimethylbutanoic acid.
Correct Answer: C — 3,3-Dimethylbutanoic acid
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Q. Identify 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-Methylhexane
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D.
3-Methylhexane
Solution
The longest chain has 5 carbons, and there are two methyl groups on the third carbon, making it 3,3-Dimethylpentane.
Correct Answer: B — 3,3-Dimethylpentane
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Q. What is the IUPAC name for the compound C2H5-CHO?
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A.
Ethanal
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B.
Propanoic acid
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C.
Acetaldehyde
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D.
Butanal
Solution
The compound is an aldehyde with two carbons, hence the name is Ethanal.
Correct Answer: A — Ethanal
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Q. What is the IUPAC name for the compound 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 four carbons, and the carbonyl group is on the second carbon, hence Butan-2-one.
Correct Answer: C — Butan-2-one
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Q. What is the IUPAC name for the compound C2H5OH?
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A.
Ethanol
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B.
Ethylene
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C.
Ethane
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D.
Acetaldehyde
Solution
C2H5OH is ethanol, which is an alcohol with two carbon atoms.
Correct Answer: A — Ethanol
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Q. What is the IUPAC name for the compound C3H6O?
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A.
Propylene oxide
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B.
Acetone
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C.
Propanal
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D.
Cyclopropanol
Solution
C3H6O is an aldehyde with three carbons, named Propanal.
Correct Answer: C — Propanal
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Q. What is the IUPAC name for the compound C3H7-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. What is the IUPAC name for the compound C6H12O?
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A.
Hexanal
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B.
Hexan-1-ol
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C.
Cyclohexanol
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D.
2-Hexanol
Solution
The compound is a cyclic alcohol with six carbons, hence it is named Cyclohexanol.
Correct Answer: C — Cyclohexanol
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Q. What is the IUPAC name for the compound C6H5-CH(CH3)-OH?
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A.
Benzyl alcohol
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B.
Phenylpropan-2-ol
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C.
2-Phenylpropan-1-ol
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D.
2-Phenylpropan-2-ol
Solution
The compound has a phenyl group and a hydroxyl group on the second carbon of a three-carbon chain, hence it is Phenylpropan-2-ol.
Correct Answer: B — Phenylpropan-2-ol
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Q. What is the IUPAC name for the compound CH3-CH(CH3)-CH2-CH3?
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A.
2-Methylbutane
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B.
3-Methylbutane
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C.
Butane
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D.
Pentane
Solution
The longest chain has four carbons, and there is a methyl group on the second carbon, making it 2-Methylbutane.
Correct Answer: A — 2-Methylbutane
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Q. What is the 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.
4-Methylbutanal
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D.
Pentanal
Solution
The longest chain has four carbons with an aldehyde group, and the methyl group is on the second carbon, making it 2-Methylbutanal.
Correct Answer: B — 2-Methylbutanal
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Q. What is the IUPAC name for the compound 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 longest carbon chain contains five carbons, and the functional group is a carboxylic acid, hence the name is Pentanoic acid.
Correct Answer: A — Pentanoic acid
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Q. What is the IUPAC name for the compound with the formula C2H5-CHO?
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A.
Ethanal
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B.
Propanoic acid
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C.
Acetaldehyde
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D.
Butanal
Solution
The compound is an aldehyde with two carbons, which is named Acetaldehyde or Ethanal.
Correct Answer: C — Acetaldehyde
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Q. What is the IUPAC name for the compound with the formula 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 has a ketone functional group with 4 carbons, making it Butan-2-one.
Correct Answer: C — Butan-2-one
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Q. What is the IUPAC name for the compound with the formula C2H5OH?
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A.
Ethanol
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B.
Ethylene glycol
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C.
Ethyl alcohol
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D.
Dimethyl ether
Solution
C2H5OH is an alcohol with 2 carbons, named Ethanol.
Correct Answer: A — Ethanol
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Q. What is the IUPAC name for the compound with the formula C3H6?
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A.
Propene
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B.
Cyclopropane
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C.
Propyne
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D.
Propane
Solution
C3H6 is an alkene with three carbons, which is named Propene.
Correct Answer: A — Propene
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Q. What is the IUPAC name for the compound with the formula C3H7-CO-CH3?
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A.
Butan-2-one
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B.
Propan-2-one
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C.
Pentanal
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D.
Butanal
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 formula C3H7-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.
Isobutyric acid
Solution
The compound is isobutyric acid, which is a branched-chain carboxylic acid with three carbons.
Correct Answer: D — Isobutyric acid
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Q. What is the IUPAC name for the compound with the formula C3H7OH?
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A.
Propan-1-ol
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B.
Propan-2-ol
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C.
Butan-1-ol
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D.
Methanol
Solution
The compound is an alcohol with three carbons and the hydroxyl group on the second carbon, hence the name is Propan-2-ol.
Correct Answer: B — Propan-2-ol
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Q. What is the IUPAC name for the compound with the formula C4H10O?
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A.
Butanol
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B.
Butanal
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C.
Ethyl methyl ether
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D.
Tert-butanol
Solution
C4H10O can be identified as an alcohol with 4 carbons, which is named Butanol.
Correct Answer: A — Butanol
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Q. What is the IUPAC name for the compound with the formula C4H8O?
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A.
Butanal
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B.
Butan-2-ol
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C.
Butan-1-ol
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D.
Cyclobutanol
Solution
C4H8O can correspond to butan-2-ol, which is a secondary alcohol.
Correct Answer: B — Butan-2-ol
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Q. What is the IUPAC name for the compound with the formula C4H9-CHO?
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A.
Butanal
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B.
Pentanal
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C.
Propionaldehyde
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D.
Isobutyraldehyde
Solution
The compound has four carbons and an aldehyde functional group, making it Butanal.
Correct Answer: A — Butanal
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Q. What is the IUPAC name for the compound with the formula C4H9-CO-CH3?
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A.
Butan-2-one
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B.
Pentanal
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C.
Butan-1-one
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D.
Propan-2-one
Solution
The compound is a ketone with a four-carbon chain, thus 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 formula C4H9-COOH?
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A.
Butanoic acid
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B.
Pentanoic acid
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C.
Hexanoic acid
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D.
Heptanoic acid
Solution
The compound has four carbons in the longest chain and a carboxylic acid functional group, hence it is Butanoic acid.
Correct Answer: A — Butanoic acid
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Q. What is the IUPAC name for the compound with the formula C4H9Cl?
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A.
1-Chlorobutane
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B.
2-Chlorobutane
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C.
Chloropropane
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D.
Butyl chloride
Solution
The compound is a chlorinated alkane with four carbons, and the chlorine is on the first carbon, making it 1-Chlorobutane.
Correct Answer: A — 1-Chlorobutane
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Q. What is the IUPAC name for the compound with the formula C5H10O?
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A.
Pentanal
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B.
2-Pentanone
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C.
3-Pentanone
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D.
Butanol
Solution
The compound is a ketone with a five-carbon chain, and the carbonyl group is on the second carbon, making it 2-Pentanone.
Correct Answer: B — 2-Pentanone
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Q. What is the IUPAC name for the compound with the formula C5H11-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 longest carbon chain contains five carbons, and the functional group is a carboxylic acid, hence the name is Pentanoic acid.
Correct Answer: A — Pentanoic acid
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Q. What is the IUPAC name for the compound with the formula C5H11-NH2?
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A.
Pentylamine
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B.
Butylamine
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C.
Hexylamine
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D.
Amylamine
Solution
The compound is a primary amine with five carbons, hence it is named Pentylamine.
Correct Answer: A — Pentylamine
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Q. What is the IUPAC name for the compound with the formula C6H12?
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A.
Hexane
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B.
Cyclohexane
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C.
1-Hexene
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D.
2-Hexene
Solution
C6H12 is a straight-chain alkane with 6 carbons, which is named Hexane.
Correct Answer: A — Hexane
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Q. What is the IUPAC name for the compound with the formula C6H5-CH=CH2?
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A.
Benzyl ethylene
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B.
Styrene
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C.
Phenylpropene
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D.
Vinylbenzene
Solution
The compound is an alkene with a phenyl group, hence the IUPAC name is Styrene.
Correct Answer: B — Styrene
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