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Answer first
Hydrocarbons PYQs (previous year questions) for JEE Main: Hydrocarbons (Chemistry) had 19 questions across the 11 official JEE Main papers we tagged (2016–2026), and appeared in 11 of them. Asked in 3 of 3 years. The concepts asked in the most papers: Free Radical Halogenation, Alkanes, Ozonolysis.
Year-wise question count
Asked in 3 of 3 years.
| Year | Papers | Questions | Per paper |
|---|---|---|---|
| JEE Main 2026 | 9 | 16 | 1.8 |
| JEE Main 2017 | 1 | 1 | 1 |
| JEE Main 2016 | 1 | 2 | 2 |
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| Alkanes | 2 | 2 | 2026 |
| Free Radical Halogenation | 2 | 2 | 2026 |
| Ozonolysis | 2 | 2 | 2026 |
| Alkene Stability | 1 | 1 | 2026 |
| Alkenes and Alkynes | 1 | 1 | 2026 |
| Alkynes | 1 | 1 | 2026 |
| Anti-Markovnikov Addition | 1 | 1 | 2017 |
| Aromatic Compounds | 1 | 1 | 2026 |
| Aromatic Substitution | 1 | 1 | 2026 |
| Aromaticity | 1 | 1 | 2026 |
| Combustion of Alkanes | 1 | 1 | 2026 |
| Electrophilic Addition | 1 | 1 | 2016 |
| Electrophilic Aromatic Substitution | 1 | 1 | 2026 |
| Friedel-Crafts Alkylation | 1 | 1 | 2026 |
| Polymers | 1 | 1 | 2016 |
| Preparation of Alkanes | 1 | 1 | 2026 |
How to practise Hydrocarbons PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Hydrocarbons questions from the official PDF against the clock, then check the answer listed below.
- Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
- Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.
Questions by year
Each line gives the question number and paper, type, concept, our one-line summary and the official answer, with a link to the official PDF.
JEE Main2026
- Q.66 (2 April, shift 1) · MCQ · Electrophilic Aromatic Substitution: Preferred site of electrophilic attack in benzanilide (official answer: option 4) PDF
- Q.72 (2 April, shift 1) · Numerical · Free Radical Halogenation: Monochloro products from C5H10 isomers that do not decolourise KMnO4 (official answer: 14) PDF
- Q.73 (2 April, shift 1) · Numerical · Combustion of Alkanes: Alkane needing 8 mol O2 for combustion; sum of C and H atoms (official answer: 17) PDF
- Q.64 (2 April, shift 2) · MCQ · Alkanes: Identify compound giving 2,4-dimethylpentane, toluene and methylcyclohexane (official answer: option 3) PDF
- Q.64 (4 April, shift 1) · MCQ · Ozonolysis: Identify alkene from its reductive ozonolysis products (official answer: option 4) PDF
- Q.72 (4 April, shift 1) · Numerical · Aromatic Substitution: Mass of product from benzene reaction sequence releasing 11.2 L CO2 (official answer: 78) PDF
- Q.64 (4 April, shift 2) · MCQ · Alkynes: Molar mass of product from styrene via dibromination, elimination, methylation, reduction (official answer: option 2) PDF
- Q.64 (5 April, shift 1) · MCQ · Ozonolysis: Identify alkene C₈H₁₄ from ozonolysis, aldol and iodoform sequence (official answer: option 4) PDF
- Q.65 (5 April, shift 1) · MCQ · Friedel-Crafts Alkylation: Statements on alkylation of benzene with n-propyl chloride (official answer: option 2) PDF
- Q.63 (5 April, shift 2) · MCQ · Alkene Stability: Stability order of substituted alkenes (official answer: option 1) PDF
- Q.65 (6 April, shift 1) · MCQ · Preparation of Alkanes: Statements on methods to prepare methane (official answer: option 4) PDF
- Q.65 (6 April, shift 2) · MCQ · Alkenes and Alkynes: Multi-step conversion of alkyl bromide to D; test for its group (official answer: option 1) PDF
- Q.69 (6 April, shift 2) · MCQ · Aromatic Compounds: Glucose to aromatic ketone sequence; count pi and lone pair electrons (official answer: option 4) PDF
- Q.72 (6 April, shift 2) · Numerical · Alkanes: Alkane needing 8 mol O2 with single monochloro product; primary carbons (official answer: 4) PDF
- Q.64 (8 April, shift 2) · MCQ · Aromaticity: Count aromatic species among given compounds and ions (official answer: option 3) PDF
- Q.65 (8 April, shift 2) · MCQ · Free Radical Halogenation: Number of dichloro products from chlorination of 2-chlorobutane (official answer: option 2) PDF
JEE Main2017
- Q.58 · MCQ · Anti-Markovnikov Addition: Stereoisomers from peroxide HBr addition to an alkene PDF
JEE Main2016
Hydrocarbons in other exams
The same chapter in other official papers we tagged: JEE Advanced (25 questions), NEET (3 questions).
Other Chemistry chapters
- Some Basic Concepts in Chemistry PYQs
- Atomic Structure PYQs
- Chemical Bonding and Molecular Structure PYQs
- Chemical Thermodynamics PYQs
- Solutions PYQs
- Equilibrium PYQs
- Redox Reactions and Electrochemistry PYQs
- Chemical Kinetics PYQs
- Classification of Elements and Periodicity PYQs
- p-Block Elements PYQs
- d- and f-Block Elements PYQs
- Coordination Compounds PYQs
- Purification and Characterisation of Organic Compounds PYQs
- Some Basic Principles of Organic Chemistry PYQs
- Organic Compounds Containing Halogens PYQs
- Organic Compounds Containing Oxygen PYQs
- Organic Compounds Containing Nitrogen PYQs
- Biomolecules PYQs
- Principles Related to Practical Chemistry PYQs
FAQ
How many Hydrocarbons questions come in JEE Main?
In the official papers we tagged: 16 in 2026 (9 papers), 1 in 2017 (1 paper) and 2 in 2016 (1 paper). That is 19 questions in all, about 7% of Chemistry.
Which Hydrocarbons topics repeat in JEE Main?
Asked in the most papers: Free Radical Halogenation, Alkanes, Ozonolysis. The concept table lists every one with its count.
Are these official JEE Main questions?
Yes. Every question is from an official JEE Main paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.