Benzene Nomenclature Quiz
Questions: 16 · 10 minutes
1. A benzene ring has adjacent ethyl and methyl substituents. Both numbering directions produce the locant set 1,2. Which name correctly resolves the tie?
1-Ethyl-2-methylbenzene
2-Ethyl-1-methylbenzene
1-Methyl-1-ethylbenzene
2-Ethyl-2-methylbenzene
2. A nitro group is ortho to the carboxyl group in benzoic acid. Which name is correct?
3-Nitrobenzoic acid
2-Nitrobenzoic acid
4-Nitrobenzoic acid
2-Aminobenzoic acid
3. What is the familiar common name of C₆H₅CH₂Cl?
Benzyl chloride
Benzoyl chloride
Benzal chloride
Phenyl chloride
4. Which locant pair represents the para relationship on a disubstituted benzene ring?
1,1
1,2
1,4
1,3
5. An ethyl group is meta to the formyl group of benzaldehyde. Treating the formyl-bearing ring carbon as carbon 1, what is the correct name?
2-Ethylbenzaldehyde
3-Ethylbenzoic acid
4-Ethylbenzaldehyde
3-Ethylbenzaldehyde
6. Bromine and chlorine are meta to each other on a benzene ring. When either substituent could receive locant 1, which name follows alphabetical precedence?
1-Chloro-3-bromobenzene
1-Bromo-3-chlorobenzene
3-Bromo-1-chlorobenzene
1-Bromo-2-chlorobenzene
7. Two possible numberings for a trimethylbenzene produce locant sets 1,3,4 and 1,2,4. Which name uses the lowest set of locants?
1,3,4-Trimethylbenzene
1,3,5-Trimethylbenzene
1,2,4-Trimethylbenzene
1,2,5-Trimethylbenzene
8. Two hydroxyl groups occupy opposite carbons of a benzene ring. Which locant-based name identifies the compound?
Benzene-1,2-diol
Benzene-1,4-diol
Benzene-1,3,5-triol
Benzene-1,3-diol
9. A benzene ring carries two chlorine substituents on neighboring ring carbons. Which locant-based name is correct?
1,4-Dichlorobenzene
1,3-Dichlorobenzene
1,2-Dichlorobenzene
1,1-Dichlorobenzene
10. A benzene ring has only one bromine substituent. Which name is normally written without an unnecessary locant?
1-Bromobenzene
Benzene bromide
Phenyl bromate
Bromobenzene
11. Styrene contains a CH₂=CH– group attached directly to benzene. What is its substitutive name?
Ethylbenzene
Ethenylbenzene
Ethynylbenzene
Methylbenzene
12. Which standard substitutive name corresponds to C₆H₅CH₃?
Ethylbenzene
Cyclohexylmethane
Methoxybenzene
Methylbenzene
13. What is the name of the C₆H₅– group when a hydrogen atom is removed directly from benzene?
Phenyl
Benzyl
Benzoyl
Cyclohexyl
14. Which prefix describes two substituents on adjacent carbons of a benzene ring?
Meta
Para
Ortho
Geminal
15. An aniline ring has bromine meta to the amino group. Numbering the amino-bearing carbon as 1, what is the compound called?
3-Bromophenol
2-Bromoaniline
4-Bromoaniline
3-Bromoaniline
16. A methyl group is para to the hydroxyl group of phenol. What is the corresponding substitutive name?
4-Methylphenol
3-Methylphenol
4-Hydroxyethylbenzene
2-Methylphenol