JEE Main Ionization Enthalpy PYQ PDF is a free, 13-page resource containing 50 questions from the 2006-2026 papers. The topic recorded 6 questions across the 2026 papers, with a reported weightage of 1.26% in the referenced database.
The PDF includes 49 MCQs alongside 1 numerical-value questions, with 12 statement-based questions. Questions are arranged from newest to oldest to help students practise recent exam patterns and revise key concepts.
The PDF Contains:
| 50 Questions | 13 Page | 1.26% ↓33.33% Weightage in 2026 | 2006-2026 years covered |
Ionization Enthalpy is a topic in the Class 11 Chemistry chapter Classification of Elements and Periodicity in Properties. Every question carries its exam date and shift. The PDF holds questions only, with options as printed and no answer key.
JEE Main Ionization Enthalpy Weightage by Year
As per JEE Main ionization enthalpy weightage from past years, students can expect 3 to 9 questions from this topic in a year in recent papers. The 2026 papers had 6.
| Year | Questions | Average per Shift | Weightage in Chemistry | Change in Weightage |
|---|---|---|---|---|
| 2026 | 6 | 0.32 | 1.26% | −33.33% |
| 2025 | 9 | 0.47 | 1.89% | +89.47% |
| 2024 | 6 | 0.30 | 1.00% | +140.00% |
| 2023 | 3 | 0.12 | 0.42% | −42.67% |
| 2022 | 5 | 0.22 | 0.73% | +13.37% |
The 2021 papers add 5 more questions, and the years before that add 16. Weightage is the topic's share of all Chemistry questions in the bank for that year.
Question Formats in JEE Main Ionization Enthalpy PYQs
The 50 questions in this PDF are split between multiple-choice and numerical-value questions. Of the 50, 12 are statement-based.
| Question Type | Questions | Share |
|---|---|---|
| MCQ | 49 | 98.0% |
| Numerical value | 1 | 2.0% |
| Total | 50 | 100% |
How to Practise Ionization Enthalpy
Revise the periodic trend and its exceptions: nitrogen above oxygen, beryllium above boron and magnesium above aluminium, which come from stable electronic configurations. Practise arranging elements by first ionization enthalpy and comparing successive ionization enthalpies.
Then attempt the statement-based questions, which test the same exceptions.
Related JEE Main Chemistry Resources
| Resource | Link |
|---|---|
| Classification of Elements and Periodicity in Properties JEE Main PYQs: full chapter page | Read and download |
| JEE Main PYQs on Periodic trends in properties of elements | Read and download |
Video: Ionization Enthalpy PYQs
Source: JEEfinity by Unacademy
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