JEE Main IUPAC Nomenclature Previous Year Questions with Solutions

IUPAC Nomenclature Previous Year Questions with Solutions are given here. The systematic approach taken for the nomenclature of organic compounds as per the recommendation of the International Union of Pure and Applied Chemistry (often abbreviated to IUPAC) is known as IUPAC nomenclature of organic compounds. The necessity for such a systematic approach arose due to the sheer quantity of new discoveries of organic compounds, which made the trivial nomenclature of organic compounds highly inconvenient. This article helps students to learn the previous year questions from IUPAC nomenclature and score higher rank for the JEE exam.

As far as the JEE exam is concerned, IUPAC nomenclature is an important topic. This chapter includes the longest chain rule, the lowest set of locants, naming complex substituents, compositional nomenclature, etc. This article gives an idea of what type of questions can be expected from this topic. BYJU’S provides accurate solutions prepared by our subject experts. Students can easily download the solutions in PDF format.

Download IUPAC Nomenclature Previous Year Solved Questions PDF

JEE Main Previous Year Solved Questions on IUPAC Nomenclature

1. The IUPAC name of neopentane is :

(1) 2–methylpropane

(2) 2, 2–dimethylbutane

(3) 2–methyl butane

(4) 2, 2–dimethylpropane

Solution:

IUPAC name is 2,2- dimethyl propane.

Hence option (4) is the answer.

2. The IUPAC name of the compound is:

(1) 1, 2-Epoxy propane

(2) Propylene oxide

(3) 1, 2–Oxo propane

(4) 1, 2–Propoxide

Solution:

Hence option (1) is the answer.

3. The IUPAC name of CH₃COCH(CH₃)₂ is

(1) 2-methyl-3-butanone

(2) 4-methylisopropyl ketone

(3) 3-methyl-2-butanone

(4) Isopropylmethyl ketone

Solution:

The longest chain is of four carbon. The Keto group is the functional group. The numbering will start from left carbon as the functional group should also have the lowest numbering. The substituent methyl group will be at the third carbon. So the IUPAC name is 3-Methyl-2-butanone.

Hence option (3) is the answer.

4. The IUPAC name of the compound

(1) 3,3- dimethyl -1- hydroxycyclohexane

(2) 1,1 – dimethyl -3- cyclohexanol

(3) 3,3- dimethyl -1- cyclohexanol

(4) 1,1 – dimethyl -3- hydroxycyclohexane

Solution:

Methyl groups are at position 3.

Hence option (2) is the answer.

5. The IUPAC name of the compound shown below is

(1) 2-bromo-6-chlorocyclohex-1-ene

(2) 6-bromo-2-chlorocyclohexene

(3) 3-bromo-1-chlorocyclohexene

(4) 1-bromo-3-chlorocyclohexene

Solution:

Higher preference is given to double bond.

Hence option (3) is the answer.

6. The IUPAC name of

is

(1) 1,1-diethyl-2,2-dimethylpentane

(2) 4,4-dimethyl-5,5-diethylpentane

(3) 5,5-diethyl-4, 4-dimethylpentane

(4) 3-ethyl-4, 4-dimethylheptane

Solution:

The IUPAC name of the given compound is 3-ethyl-4, 4-dimethylheptane.

Hence option (4) is the answer.

7. What is the IUPAC name of the following compound?

(1) 4-Bromo-3-methylpent-2-ene

(2) 2-Bromo-3-methylpent-3-ene

(3) 3-Bromo-3-methyl-1,2-dimethylprop-1-ene

(4) 3-Bromo-1,2-dimethylbut-1-ene

Solution:

The IUPAC name is 4-Bromo-3-methylpent-2-ene

Hence option (1) is the answer.

8. The IUPAC name of the following compound is

(1) 2-methyl-3-hydroxypentan-5-oic acid

(2) 4,4-dimethyl-3-hydroxybutanoic acid

(3) 4-methyl-3-hydroxypentanoic acid

(4) 3-hydroxy-4-methylpentanoic acid.

Solution:

The IUPAC name is 3-hydroxy-4-methylpentanoic acid.

Hence option (4) is the answer.

9. The IUPAC name for the following compound is

(1) 3-methyl-4-(1-methylprop-2-ynyl)-1-heptene

(2) 3,5-dimethyl-4-propylhept-6-en-1-yne

(3) 3,5-dimethyl-4-propylhept-1-en-6-yne

(4) 3-methyl-4-(3-methylprop-1-enyl)-1-heptyne

Solution:

The IUPAC name is 3,5-dimethyl-4-propylhept-1-en-6-yne

Hence option (3) is the answer.

10. Which of the following compounds has the wrong IUPAC name?

(a) CH₃ -CH₂ -CH₂– COO – CH₂CH₃ ethyl butanoate

Solution:

Hence option (c) is the answer.

11. The systematic name of CH₃-CHBr-CH₂OH is

(1) 3-hydroxy-2-bromopropane

(2) 2-bromopropanol-1

(3) 2-bromo-3-propanol

(4) 3-hydroxy isopropyl bromide

Solution:

CH₃-CHBr-CH₂OH is 2-bromopropanol-1.

Hence option (2) is the answer.

12. The IUPAC name of CH₃CHO is

(1) Acetaldehyde

(2) Methyl aldehyde

(3) Ethanol

(4) Ethanal

Solution:

Ethanal is the IUPAC name of CH₃CHO.

Hence option (4) is the answer.

13. The IUPAC name of acetyl salicylic acid is

(1) m-benzoic acid

(2) 2-acetoxy benzoic acid

(3) p-benzoic acid

(4) p-acetyl benzoic acid

Solution:

The IUPAC name of acetyl salicylic acid is 2-acetoxy benzoic acid.

Hence option (2) is the answer.

14. The IUPAC name of CH₃-O-C₂H₅

(1) Ethoxymethane

(2) Methoxyethane

(3) Methyl ethyl ether

(4) Ethyl methyl ether

Solution:

Small-substituent is CH₃.

The big chain is C₂H₅.

So IUPAC name is methoxy ethane.

Hence option (2) is the answer.

15. The IUPAC name of CH₃C ≡ N is

(1) Acetonitrile

(2) Ethanenitrile

(3) Methyl cyanide

(4) Cyanoethane

Solution:

The IUPAC name of CH₃C ≡ N is Ethanenitrile.

Hence option (2) is the answer.

16. The IUPAC name of CH₃COOC₂H₅ is

(1) Ethyl acetate

(2) Ethyl ethanoate

(3) Methyl propanoate

(4) None of these

Solution:

The IUPAC name of CH₃COOC₂H₅ is Ethyl ethanoate.

Hence option (2) is the answer.

IUPAC Nomenclature of Organic Compounds

IUPAC Nomenclature for Unsaturated Hydrocarbons