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Classification of Elements and Periodicity PYQs (previous year questions) for JEE Main: Classification of Elements and Periodicity (Chemistry) had 15 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: Ionisation Enthalpy, Nature of Oxides, s-Block Elements.
Year-wise question count
Asked in 3 of 3 years.
| Year | Papers | Questions | Per paper |
|---|---|---|---|
| JEE Main 2026 | 9 | 10 | 1.1 |
| JEE Main 2017 | 1 | 2 | 2 |
| JEE Main 2016 | 1 | 3 | 3 |
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| Ionisation Enthalpy | 4 | 4 | 2026 |
| Nature of Oxides | 2 | 2 | 2026 |
| s-Block Elements | 2 | 2 | 2017, 2016 |
| Electronegativity | 1 | 1 | 2026 |
| Hydrogen and Water | 1 | 1 | 2016 |
| Ionization Energy | 1 | 1 | 2016 |
| Ionization Enthalpy | 1 | 1 | 2026 |
| Isoelectronic Species | 1 | 1 | 2017 |
| Periodic Table Position | 1 | 1 | 2026 |
| Periodic Trends | 1 | 1 | 2026 |
How to practise Classification of Elements and Periodicity PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Classification of Elements and Periodicity 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.59 (2 April, shift 1) · MCQ · Ionisation Enthalpy: Statements on first and third ionisation enthalpy orders (official answer: option 4) PDF
- Q.58 (2 April, shift 2) · MCQ · Nature of Oxides: Set of oxides containing basic, acidic, amphoteric and neutral oxides (official answer: option 3) PDF
- Q.59 (2 April, shift 2) · MCQ · Ionisation Enthalpy: Statements on ionisation enthalpy order in groups 13 and 14 (official answer: option 2) PDF
- Q.58 (4 April, shift 1) · MCQ · Periodic Table Position: Identify an element from its anion; atomic mass, group and physical state (official answer: option 1) PDF
- Q.57 (4 April, shift 2) · MCQ · Ionization Enthalpy: Probable second ionization enthalpy of Mg from the first (official answer: option 3) PDF
- Q.58 (5 April, shift 1) · MCQ · Electronegativity: Statements on electronegativity order and oxidation states of oxygen (official answer: option 1) PDF
- Q.58 (5 April, shift 2) · MCQ · Nature of Oxides: Statements on acidic, basic, neutral and amphoteric nature of oxides (official answer: option 1) PDF
- Q.71 (6 April, shift 1) · Numerical · Ionisation Enthalpy: Energy to convert given mass of Li gas to Li2+ (official answer: 4) PDF
- Q.58 (6 April, shift 2) · MCQ · Periodic Trends: Ionisation enthalpy at left end and electron gain at right end of period (official answer: option 3) PDF
- Q.58 (8 April, shift 2) · MCQ · Ionisation Enthalpy: Match period-2 configurations with first ionisation energies (official answer: option 1) PDF
JEE Main2017
JEE Main2016
Classification of Elements and Periodicity in other exams
The same chapter in other official papers we tagged: NEET (4 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
- 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
- Hydrocarbons 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 Classification of Elements and Periodicity questions come in JEE Main?
In the official papers we tagged: 10 in 2026 (9 papers), 2 in 2017 (1 paper) and 3 in 2016 (1 paper). That is 15 questions in all, about 5% of Chemistry.
Which Classification of Elements and Periodicity topics repeat in JEE Main?
Asked in the most papers: Ionisation Enthalpy, Nature of Oxides, s-Block Elements. 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.