The NCERT Exemplar Class 12 Physics Atoms below carries the complete Exemplar chapter for Class 12 Physics Chapter 12 Atoms, with five question types in one slim PDF. Download the NCERT Exemplar Class 12 Physics Atoms and tackle MCQ-I, MCQ-II, VSA, SA and LA together. The NCERT Exemplar Class 12 Physics Atoms is published by NCERT itself, not a third party.
- CBSE Weightage: 3 to 4 marks (Class 12 Physics Boards)
- JEE Main Weightage: 2 to 3% (typically 1 to 2 questions per shift drawn from this chapter)
- NEET Weightage: 2 to 3 question(s) per year
Both downloads of the NCERT Exemplar Class 12 Physics Atoms on this page are free and updated for the 2026-27 NCERT syllabus.
This Exemplar Book PDF page is curated by Collegedunia subject experts, mapped to the 2026-27 NCERT print, and cross-referenced with the last two sittings of CBSE Boards, JEE Main, and NEET.
Also Check:
- Atoms Class 12 Physics NCERT Exemplar Solutions
- Atoms Class 12 Physics NCERT Book PDF
- Atoms Class 12 Physics NCERT Solutions
How will the NCERT Exemplar Class 12 Physics Atoms on Collegedunia Help You?
This page hosts the official 2026-27 print and adds the practice-strategy layer that a raw Exemplar PDF lacks.
- 2026-27 NCERT Alignment: Every problem in the 29-question set is mapped to a sub-topic that still belongs to the current Class 12 Physics syllabus, so you do not waste time on dropped content.
- Question-Type Inventory: A clear count of MCQ-I, MCQ-II, VSA, SA, and LA problems lets you pace each sitting against the actual size of the load.
- Self-Test Format: The book prints only the problems, so you can attempt cold, mark your weak ones, and return to them in the final revision week.
- JEE and NEET Crossover: Recent JEE Main and NEET sittings have reused Exemplar setups almost verbatim. Working this NCERT Exemplar Class 12 Physics Atoms is the cheapest way to lift your entrance-exam Physics score for Atoms.
Atoms NCERT Exemplar Video Walkthrough
Source: JEE Wallah on YouTube
What's Inside the NCERT Exemplar Class 12 Physics Atoms
The Exemplar runs about 6 pages and packs the problems into five fixed sections. The topic map below tells you where each sub-topic is concentrated, so you can target your weakest area without scanning the whole chapter.
| Sub-Topic Concentration | Problem Numbers |
|---|---|
| Rutherford alpha-scattering and nuclear size | 12.1, 12.7, 12.13, 12.18 |
| Bohr model and quantisation conditions | 12.2, 12.8, 12.14, 12.19, 12.24, 12.27 |
| Hydrogen spectrum and spectral series | 12.3, 12.4, 12.9, 12.15, 12.20, 12.25, 12.29 |
| Energy levels and ionisation energy | 12.5, 12.10, 12.16, 12.21, 12.26 |
| Limitations of Bohr's model and de Broglie quantisation | 12.6, 12.11, 12.12, 12.17, 12.22, 12.23, 12.28 |
Atoms NCERT Exemplar Question-Type Breakdown
The 2026-27 Exemplar print divides Chapter 12 into five question types. The split below tells you how many of each kind you face and the indicative mark value used in the Exemplar's own marking scheme.
| Question Type | Number of Problems | Indicative Marks Each |
|---|---|---|
| MCQ-I (single correct) | 7 | 1 |
| MCQ-II (one or more correct) | 6 | 2 |
| Very Short Answer (VSA) | 5 | 1 to 2 |
| Short Answer (SA) | 5 | 3 |
| Long Answer (LA) | 6 | 5 |
| Total | 29 | - |
MCQ-II is the most-failed type because at least one option besides the obvious one is correct; treat it as a slow type, not a quick one.
2026-27 Syllabus Status of Atoms Exemplar Problems
The NCERT Exemplar publication was not rationalised when the NCERT Exemplar Class 12 Physics Atoms was trimmed in 2023. Some Exemplar problems still touch sub-topics that are no longer part of the current Class 12 Physics chapter. Skip those during board preparation; keep them only if you are working the book for JEE Main or NEET, where the entire scope still matters.
Detailed kept-trimmed-removed table: see the breakdown on the Atoms Class 12 Physics NCERT Book PDF page.
Why the NCERT Exemplar Matters for JEE Main and NEET Atoms Prep
The NCERT Exemplar is the official NCERT publication that paper-setters reference when they design HOTS problems for both the CBSE Board and the JEE Main / NEET papers. Three reasons it deserves a slot in your study plan:
- Same author body: The committees that write NCERT textbook and NCERT Exemplar overlap. Practising the Exemplar trains you on the exact phrasing CBSE markers expect.
- Five question types: Few other resources cover MCQ-I, MCQ-II, VSA, SA, and LA in one book. The mix matches today's CBSE paper structure and the JEE Main MCQ-II / multiple-correct trap-style.
- Free and offline: The PDF works on a phone with no reader app. Print only the section you need (the LA pages, for instance) without buying a private question bank.
Boards toppers consistently cite the Exemplar as the single book that lifted their score from a B1 to an A1 in Physics.
JEE Main and NEET Atoms Questions Inspired by the Exemplar
Recent entrance papers reused the setup of several Exemplar problems from this chapter. The instances below come from the last two sittings of JEE Main and NEET.
Full year-wise PYQ map: Atoms Class 12 Physics NCERT Solutions
How to Use the Exemplar PDF Alongside the NCERT Textbook
The Exemplar is not a replacement for the NCERT chapter; it is the next layer on top. The parallel-track plan below is the one most CBSE toppers follow for Atoms.
- Finish the NCERT chapter first: Read sections, work every intext Example, attempt all back-exercises. Do not open the Exemplar until this is done.
- Attempt Exemplar MCQ-I and MCQ-II in one sitting: Use only your formula sheet. Time-box to 60 to 75 minutes.
- Take VSA and SA across two short sittings: These are the bridge between MCQ and full LA. Each problem averages 5 to 8 minutes.
- Tackle LA problems one per day: Each LA-type problem takes 20 to 25 minutes and trains the 5-mark answer-writing flow CBSE markers reward.
- Mark every wrong attempt with a star: Return to starred problems in the week before boards. Do not re-read solved ones unless you are short of time.
Atoms Top Formulae to Memorise Before Attempting the Exemplar
Most Exemplar problems hinge on a small set of recurring formulas. Lock these four into memory before opening the NCERT Exemplar Class 12 Physics Atoms; you will save 30 to 40% of attempt time per problem.
| Concept | Formula |
|---|---|
| Bohr radius for the n-th orbit | r_n = n squared a_0 |
| Energy of the n-th level (H atom) | E_n = -13.6 / n squared eV |
| Rydberg formula | 1 / lambda = R 1 / n1 squared - 1 / n2 squared |
| Angular momentum quantisation | L = n h / 2 pi |
Full master table: Atoms Class 12 Physics Formula Sheet
Atoms CBSE Marks Weightage Compared Across Class 12 Physics Chapters
The visual below maps the typical CBSE Class 12 Physics marks distribution across all 14 chapters of the NCERT book, averaged over the last five board papers. This is the same canonical table used by every Atoms Collegedunia resource page, so the numbers match the bullets at the top of this article.
More Atoms Class 12 Physics Resources
NCERT Exemplar Book PDF for Class 12 Physics: All Chapters
Other Class 12 Physics NCERT Exemplar Book PDFs you can grab as free downloads:
| Chapter | Resource |
|---|---|
| Chapter 1 | Electric Charges and Fields Exemplar Book PDF |
| Chapter 2 | Electrostatic Potential and Capacitance Exemplar Book PDF |
| Chapter 3 | Current Electricity Exemplar Book PDF |
| Chapter 4 | Moving Charges and Magnetism Exemplar Book PDF |
| Chapter 5 | Magnetism and Matter Exemplar Book PDF |
| Chapter 6 | Electromagnetic Induction Exemplar Book PDF |
| Chapter 7 | Alternating Current Exemplar Book PDF |
| Chapter 8 | Electromagnetic Waves Exemplar Book PDF |
| Chapter 9 | Ray Optics and Optical Instruments Exemplar Book PDF |
| Chapter 10 | Wave Optics Exemplar Book PDF |
| Chapter 11 | Dual Nature of Radiation and Matter Exemplar Book PDF |
| Chapter 13 | Nuclei Exemplar Book PDF |
| Chapter 14 | Semiconductor Electronics Exemplar Book PDF |
NCERT Exemplar Class 12 Physics Atoms: available above as a free PDF download, fully aligned to the 2026-27 NCERT release.
NCERT Exemplar Class 12 Physics Atoms - Frequently Asked Questions
Ques. Where can I download the NCERT Exemplar Class 12 Physics Atoms for free?
Ans. You can download the NCERT Exemplar Class 12 Physics Atoms directly from this page. Both the Normal and HD versions are available, and both are free.
Ques. Is the Exemplar Book PDF aligned with the 2026-27 NCERT?
Ans. The NCERT Exemplar publication was not rationalised when the NCERT Exemplar Class 12 Physics Atoms was trimmed. The bulk of Chapter 12 problems still map to the current 2026-27 textbook chapter; a small minority touch sub-topics that were removed and can be skipped during board preparation.
Ques. How many pages is the Class 12th Physics Chapter 12 Exemplar Book PDF?
Ans. The NCERT Exemplar Class 12 Physics Atoms Exemplar PDF runs approximately 6 pages and packs 29 HOTS problems across MCQ-I, MCQ-II, VSA, SA, and LA types.
Ques. Is this NCERT Exemplar Class 12 Physics Atoms aligned with the 2026-27 CBSE syllabus?
Ans. Chapter 12 of the Class 12 Physics Exemplar holds 29 problems in total, split as MCQ-I (7), MCQ-II (6), VSA (5), SA (5), and LA (6).
Ques. Are Exemplar problems compulsory for the CBSE Class 12 board exam?
Ans. Exemplar problems are not part of the prescribed NCERT textbook chapter, but CBSE has used Exemplar-style HOTS items in 4 of the last 5 board papers. For an A1 grade in Physics, working the Exemplar is practically required.
Ques. Where can I find the solutions to the Atoms Exemplar problems?
Ans. solved answers for every problem in this chapter are on the Atoms Class 12 Physics NCERT Exemplar Solutions page.
Ques. How long does it take to finish Chapter 12 of the Exemplar Book?
Ans. Plan for around 10 to 14 hours spread across four to five sittings: one hour for the MCQ types, two to three hours for VSA and SA, and the rest for the LA section. Always revisit any wrong attempts the same day to lock in the correction.
Ques. Can I use the Exemplar Book for JEE Main and NEET preparation?
Ans. Yes. JEE Main 2024 and 2025 each carried at least one question whose setup mirrored an Exemplar problem from Chapter 12. NEET also reuses Exemplar MCQ-II patterns. Use the NCERT Exemplar Class 12 Physics Atoms during your year, then revisit before the entrance.
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