JEE Main Acid-Base Ionization and Buffers PYQ PDF is a free, 16-page resource containing 65 questions from the 2002-2026 papers. The topic recorded 6 questions across the 2026 papers, with a reported weightage of 1.26% in the referenced database.
The PDF includes 41 MCQs alongside 24 numerical-value questions, with 8 statement-based questions and 2 questions that refer to a figure or graph. Questions are arranged from newest to oldest to help students practise recent exam patterns and revise key concepts.
The PDF Contains:
| 65 Questions | 16 Page | 1.26% ↑20.00% Weightage in 2026 | 2002-2026 years covered |
Acid-Base Ionization and Buffers is a topic in the Class 11 Chemistry chapter Equilibrium. Every question carries its exam date and shift. The PDF holds questions only, with options as printed and no answer key.
JEE Main Acid-Base Ionization and Buffers Weightage by Year
As per JEE Main acid-base ionization and buffers weightage from past years, students can expect 3 to 11 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% | +20.00% |
| 2025 | 5 | 0.26 | 1.05% | +110.53% |
| 2024 | 3 | 0.15 | 0.50% | −67.27% |
| 2023 | 11 | 0.46 | 1.53% | +50.16% |
| 2022 | 7 | 0.30 | 1.02% | +58.72% |
The 2021 papers add 5 more questions, and the years before that add 28. Weightage is the topic's share of all Chemistry questions in the bank for that year.
Question Formats in JEE Main Acid-Base Ionization and Buffers PYQs
The 65 questions in this PDF are split between multiple-choice and numerical-value questions. Of the 65, 8 are statement-based and 2 refer to a figure or graph.
| Question Type | Questions | Share |
|---|---|---|
| MCQ | 41 | 63.1% |
| Numerical value | 24 | 36.9% |
| Total | 65 | 100% |
How to Practise Acid-Base Ionization and Buffers
Practise the pH of strong and weak acids and bases, using Ka or Kb and the degree of ionization α = √(Ka/C). Then work through buffer questions with the Henderson-Hasselbalch equation, pH = pKa + log([salt]/[acid]).
Finish with mixtures of an acid and a base, where you first find the moles left over and then the pH.
Related JEE Main Chemistry Resources
| Resource | Link |
|---|---|
| Equilibrium JEE Main PYQs: full chapter page | Read and download |
| JEE Main PYQs on Buffer solutions | Read and download |
Video: Acid-Base Ionization and Buffers PYQs
Source: NexUacademy JEE
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