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.
Download Complete Chapter Notes of Organic Chemistry : Some Basic Principles and Techniques
Download Now
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. BYJUβS 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) 2βmethylpropane
(2) 2, 2βdimethylbutane
(3) 2βmethyl butane
(4) 2, 2βdimethylpropane
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, 2βOxo propane
(4) 1, 2βPropoxide
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 β dimethyl -3- cyclohexanol
(3) 3,3- dimethyl -1- cyclohexanol
(4) 1,1 β 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 -CH2β COO β 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 β‘ N is
(1) Acetonitrile
(2) Ethanenitrile
(3) Methyl cyanide
(4) Cyanoethane
Solution:
The IUPAC name of CH3C β‘ 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

Comments