JEE Main · Chemistry · Organic Chemistry: Some Basic Principles and Techniques
IUPAC Nomenclature: JEE Main previous year questions
23 questions in the 108 JEE Main shifts Lumi analysed, in 7 of 8 years. Pattern: Asked most years. 14 came in 2024–26. Here is how it is asked and which ideas come back.
- Questions
- 23
- in 23 of 108 shifts
- Years asked
- 7/8
- last asked 2026
- Weighted estimate
- 0.2
- model; history: 0.2 a shift on average, typically 0.0–0.4
Key findings
- 01
Asked in 7 of 8 years with analysed shifts and in 23 of 108 shifts: 23 questions, #131 of 196 topics.
- 02
57% of its questions since 2020 tested an idea no earlier year had asked; 7 repeated an idea from the year before.
- 03
The most repeated idea is Functional Group Priority, asked 7 times in 7 shifts (2020, 2022, 2023, 2024, 2025, 2026), most often as “iupac name of polyfunctional compound”.
- 04
JEE Main has asked 12 of the 50 ideas in this topic; 34 have never been asked, directly or inside another question.
- 05
Mostly asked as single correct (52%); 0% need a numerical answer, 65% are easy and 0% hard. It went up from 0.1 to 0.3 questions a shift since 2024.
- 06
The skill tested most is application (78%), then recall (22%).
Questions a shift, year by year
Out of the 25 Chemistry questions in a shift. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift.
Raw count: 2017: 0 in 1 shift · 2020: 3 in 12 shifts · 2021: 1 in 24 shifts · 2022: 4 in 24 shifts · 2023: 1 in 12 shifts · 2024: 9 in 18 shifts · 2025: 4 in 8 shifts · 2026: 1 in 9 shifts.
- Up to 2023
- 0.1
- a shift, of 25
- Since 2024
- 0.3
- 0.2
- Usual gap
- 1.0 yrs
- between years asking it
- Shifts with it
- 23/108
- 21% of analysed shifts
How it is asked
Difficulty, format and skill
Across all 23 questions on IUPAC Nomenclature since 2017.
Difficulty
QUESTIONS- Easy15 · 65%
- Medium8 · 35%
- Hard0 · 0%
Format
SHARE- Single correct · 12 Q52%
- Diagram based · 7 Q30%
- Two statements · 3 Q13%
- Match the list · 1 Q4%
Skill tested
SHARE- Application · 18 Q78%
- Recall · 5 Q22%
Repeats
New idea, or one asked before?
Each column is a year. Blue questions tested an idea no earlier year had asked; navy ones went back to an idea from an earlier year. 2017 is the first year, so everything in it counts as new. Heights are question counts, and Lumi analysed 1 to 24 shifts a year, so compare the split inside a column rather than heights across years.
- Idea asked for the first time
- Idea asked in an earlier year
Coverage of the topic
JEE Main has asked 12 of the 50 ideas in this topic. 34 have never been asked yet.
- Asked directly12 · 24%
- Touched inside another question4 · 8%
- Never asked34 · 68%
Ideas come from Lumi’s JEE syllabus map. A never-asked idea is not a safe skip: across all of JEE Main, 22% of questions since 2024 tested an idea no earlier year had asked.
Drill down
Chapter, idea, question
Every idea JEE Main tested in this topic, with its eight years. Open one to read the questions.
9 ideas inside
Squares are the 8 years with analysed shifts, 2017 to 2026. A number is the questions that year when there is more than one; the shade is scaled to one shift, so a year with more analysed shifts (1 to 24 a year) does not look darker. Share is of the level above.
Ideas
Every idea inside this topic
12 different ideas were tested; 5 came more than once.
iupac name of polyfunctional compound
Single correct · 7 shiftsiupac name of polyfunctional compound
Diagram based · 3 shiftsiupac name of enyne alcohol
Diagram based · 2 shiftsiupac name of substituted cycloalkenol
Single correct · 2 shiftsidentify structure from iupac name
Diagram based · 2 shiftsiupac name of polyfunctional compound
Single correct · 1 shiftidentify structure from iupac name
Single correct · 1 shiftstatement i/ii on common and iupac names of aromatic amines
Two statements · 1 shiftmatch list on ring system classification
Match the list · 1 shiftstructure of ethylidene chloride
Single correct · 1 shiftiupac name of keto-nitro-enal
Diagram based · 1 shiftiupac name of substituted ring acid
Diagram based · 1 shift
| Idea | Years asked | Times | Shifts | Format | Numerical |
|---|---|---|---|---|---|
| Functional Group Priorityiupac name of polyfunctional compound | 7 | 7 | Single correctApplication | – | |
| Polyfunctional Aromatic Compoundsiupac name of polyfunctional compound | 3 | 3 | Diagram basedApplication | – | |
| Alkene vs Alkyne Numbering Tiebreakeriupac name of enyne alcohol | 2 | 2 | Diagram basedApplication | – | |
| Cyclic Compound Namingiupac name of substituted cycloalkenol | 2 | 2 | Single correctApplication | – | |
| Lowest Locant Ruleidentify structure from iupac name | 2 | 2 | Diagram basedApplication | – | |
| Nomenclature of Cyanides and Isocyanidesiupac name of polyfunctional compound | 1 | 1 | Single correctApplication | – | |
| Oxo vs Formyl Prefixesidentify structure from iupac name | 1 | 1 | Single correctApplication | – | |
| Retained Common Names for Aromatic Compoundsstatement i/ii on common and iupac names of aromatic amines | 1 | 1 | Two statementsRecall | – | |
| Bicyclo and Spiro Nomenclaturematch list on ring system classification | 1 | 1 | Match the listRecall | – | |
| IUPAC-Retained Common Namesstructure of ethylidene chloride | 1 | 1 | Single correctRecall | – | |
| Oxo vs Formyl Prefix for Aldehydesiupac name of keto-nitro-enal | 1 | 1 | Diagram basedApplication | – | |
| Special Suffixes for Ring-Attached Functional Groupsiupac name of substituted ring acid | 1 | 1 | Diagram basedApplication | – |
Times and shifts count every analysed shift. Across JEE Main, 78% of questions since 2024 went back to an idea an earlier year had asked; the rest were new. All repeated ideas
Every question
IUPAC Nomenclature questions, year by year
The opening words of each question as it appeared in the official paper, with the idea it tested. Open one for its options and the official answer.
JEE Main 20261 question in 1 shift
- 2 Apr, Shift 1Q65In IUPAC nomenclature, the correct order of decreasing priority of functional group is :
Idea: Functional Group Priority
Asked the year beforeEasySingle correct
JEE Main 20254 questions in 4 shifts
- 3 Apr, Shift 2Q66What is the correct IUPAC name of [structure] ?
Idea: Polyfunctional Aromatic Compounds
Asked the year beforeEasyDiagram based · figure - 4 Apr, Shift 2Q64The IUPAC name of the following compound is :
Idea: Alkene vs Alkyne Numbering Tiebreaker
MediumSingle correct - 7 Apr, Shift 1Q65Which of the following is the correct IUPAC name of given organic compound (X)?
Idea: Functional Group Priority
Asked the year beforeEasySingle correct · figure - 8 Apr, Shift 2Q63What is the correct IUPAC name of [structure: cyclopentene ring with an ethyl group on one ring carbon and an OH group on another] ?
Idea: Cyclic Compound Naming
Asked the year beforeMediumSingle correct · figure
JEE Main 20249 questions in 9 shifts
- 5 Apr, Shift 2Q73The correct nomenclature for the following compound is :
Idea: Functional Group Priority
Asked the year beforeMediumDiagram based · figure - 8 Apr, Shift 1Q74Given below are two statements: Statement I: [figure: Compound A, a benzene ring bearing Cl, and two groups] IUPAC name of…
Idea: Polyfunctional Aromatic Compounds
EasyTwo statements · figure - 8 Apr, Shift 2Q74IUPAC name of following hydrocarbon(X) is : (branch below the 2nd, 5th and…
Idea: Lowest Locant Rule
New ideaEasySingle correct · figure - 1 Feb, Shift 1Q72Given below are two statements : Statement (I) : Aminobenzene and aniline are same organic compounds. Statement (II) : Aminobenzene and…
Idea: Retained Common Names for Aromatic Compounds
New ideaEasyTwo statements - 27 Jan, Shift 1Q70IUPAC name of following compound (P) is :
Idea: Cyclic Compound Naming
New ideaEasySingle correct · figure - 30 Jan, Shift 1Q70Structure of 4-Methylpent-2-enal is :
Idea: Oxo vs Formyl Prefixes
New ideaEasySingle correct · figure - 30 Jan, Shift 2Q74IUPAC name of following compound is : with on the CH carbon
Idea: Nomenclature of Cyanides and Isocyanides
New ideaEasySingle correct · figure - 31 Jan, Shift 1Q75Given below are two statements: Statement I: IUPAC name of is 7-hydroxyheptan-2-one. Statement II:…
Idea: Functional Group Priority
Asked the year beforeEasyTwo statements - 31 Jan, Shift 2Q74Identify structure of 2,3-dibromo-1-phenylpentane.
Idea: Lowest Locant Rule
New ideaEasyDiagram based · figure
JEE Main 20231 question in 1 shift
- 8 Apr, Shift 2Q72The correct IUPAC nomenclature for the following compound is: [structure: ]
Idea: Functional Group Priority
Asked the year beforeEasySingle correct · figure
JEE Main 20224 questions in 4 shifts
- 26 Jul, Shift 2Q73The correct decreasing order of priority of functional groups in naming an organic compound as per IUPAC system of nomenclature is
Idea: Functional Group Priority
EasySingle correct · figure - 28 Jul, Shift 1Q72Match List - I with List - II. List - I | List - II (A) [figure: five-membered saturated ring containing one O atom…
Idea: Bicyclo and Spiro Nomenclature
New ideaMediumMatch the list · figure - 25 Jun, Shift 1Q74The IUPAC name of ethylidene chloride is :
Idea: IUPAC-Retained Common Names
New ideaEasySingle correct - 28 Jun, Shift 2Q73The correct IUPAC name of the following compound is :
Idea: Oxo vs Formyl Prefix for Aldehydes
New ideaMediumDiagram based · figure
JEE Main 20211 question in 1 shift
- 31 Aug, Shift 1Q43Choose the correct name for compound given below :
Idea: Alkene vs Alkyne Numbering Tiebreaker
New ideaMediumDiagram based · figure
JEE Main 20203 questions in 3 shifts
- 2 Sep, Shift 1Q39The IUPAC name for the following compound is :
Idea: Functional Group Priority
New ideaEasyDiagram based · figure - 4 Sep, Shift 1Q40The IUPAC name of the following compound is :
Idea: Special Suffixes for Ring-Attached Functional Groups
New ideaMediumDiagram based · figure - 6 Sep, Shift 2Q31The IUPAC name of the following compound is :
Idea: Polyfunctional Aromatic Compounds
New ideaMediumSingle correct · figure
Questions from the official JEE Main Paper 1 shifts published by NTA (CBSE for 2017). Questions NTA dropped are left out. Topic and idea tags, counts and notes are Lumi’s.