Download the official Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Exemplar Book PDF here, with 50 HOTS problems across six question types.
- CBSE Weightage: 6 to 8 marks (Class 12 Chemistry Boards)
- JEE Main Weightage: 4 to 5% (typically 2 to 3 questions per shift drawn from this chapter)
- NEET Weightage: 2 to 3 question(s) per year
Curated by Collegedunia subject experts and mapped to the 2026-27 NCERT print.
Also Check:
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Exemplar Solutions
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Book PDF
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Solutions
Why the NCERT Exemplar Matters for JEE Main and NEET Aldehydes Ketones Carboxylic Acids Prep
Paper-setters reference this book when designing HOTS problems for CBSE, JEE Main, and NEET. Three reasons it earns a slot in your plan:
- Exam-style phrasing: Trains you on the mechanism and acidity-reasoning phrasing CBSE markers expect.
- Six question types: MCQ-I, MCQ-II, SA, Matching, Assertion-Reason, and LA in one book.
- Free and offline: Works on a phone with no reader app.
How will Collegedunia's NCERT Exemplar Book PDF Help You with Aldehydes, Ketones and Carboxylic Acids?
This page hosts the official 2026-27 print and adds a practice-strategy layer.
- 2026-27 NCERT Alignment: Every problem maps to a sub-topic of the current Chapter 8.
- Question-Type Inventory: A clear count of each type lets you pace each sitting.
- Self-Test Format: Attempt cold, flag the wrong ones, revisit in revision week.
- JEE and NEET Crossover: Recent sittings reuse Exemplar setups almost verbatim.
Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry Explained
Source: JEE Wallah on YouTube
Aldehydes, Ketones and Carboxylic Acids NCERT Exemplar Question-Type Breakdown
The Exemplar splits Chapter 8 across six question types. The table shows how many of each you face and the indicative mark value.
| Question Type | Number of Problems | Indicative Marks Each |
|---|---|---|
| MCQ-I (single correct) | 12 | 1 |
| MCQ-II (one or more correct) | 6 | 2 |
| Short Answer (SA) | 19 | 2 to 3 |
| Matching Type | 4 | 3 |
| Assertion and Reason | 5 | 1 |
| Long Answer (LA) | 4 | 5 |
| Total | 50 | - |
MCQ-II is the most-failed type here: the trap is deciding which of HCN, NaHSO3, Fehling and Grignard react with both acetone and benzaldehyde.
What's Inside the Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry Exemplar PDF
The Exemplar runs about 12 pages. The topic map shows where each sub-topic is concentrated.
| Sub-Topic Concentration | Where in the Exemplar |
|---|---|
| Nucleophilic addition reactivity order (aldehyde vs ketone) | Q 1, 2, 13, 16, 20, 26 |
| Preparation of aldehydes and ketones (Rosenmund, Stephen, Etard, Gattermann-Koch) | Q 4, 19, 22, 28, 47 |
| Cannizzaro and aldol condensation | Q 6, 7, 15, 17, 27, 31, 35 |
| Distinguishing tests (Tollens, Fehling, iodoform, 2,4-DNP) | Q 5, 23, 33, 41, 48 |
| Acidity ordering of substituted carboxylic acids | Q 3, 14, 18, 32, 42, 43, 49 |
| Reactions of carboxylic acids (HVZ, esterification, decarboxylation) | Q 21, 24, 29, 30, 34, 36, 37, 50 |
| Mechanism prompts (nucleophilic addition, base-catalysed aldol) | Q 11, 12, 25, 31, 44, 45 |
| Matching and Assertion-Reason items | Q 38-46 (mixed topics across aldehyde, ketone, acid) |
Aldehydes, Ketones and Carboxylic Acids Exemplar vs NCERT Textbook: Difficulty Comparison
The Exemplar twists setups you have already met in the textbook. The shift is one of three kinds, shown below.
| Setup | NCERT Textbook | Exemplar Twist |
|---|---|---|
| Nucleophilic addition reactivity | Compare HCHO with CH3CHO and CH3COCH3 | Rank five carbonyls including steric (di-tert-butyl ketone) and electronic (p-nitrobenzaldehyde) effects together |
| Aldol condensation | Self-aldol of ethanal | Cross-aldol of HCHO with CH3COCH3, identify all four possible products and pick the major |
| Distinguishing tests | Tollens vs Fehling vs iodoform | Single reagent that distinguishes a given pair (pentan-2-one vs pentan-3-one) with mechanistic justification |
| Acidity ordering | HCOOH vs CH3COOH vs ClCH2COOH | Order five substituted acids (mono-, di-, tri-chloro and fluoro acetic acids) with multi-effect reasoning |
JEE Main and NEET Aldehydes Ketones Carboxylic Acids Questions Inspired by the Exemplar
Recent entrance papers have reused setups from this chapter. The instances below come from the last two sittings of JEE Main and NEET.
Full year-wise PYQ map: Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Solutions
2026-27 Syllabus Status of Aldehydes, Ketones and Carboxylic Acids Exemplar Problems
The Exemplar still labels the chapter "Unit 12", but almost every problem maps to the current Chapter 8. A handful touch trimmed industrial-process detail; skip those for boards, keep them for JEE Main or NEET.
Detailed kept-trimmed-removed table: see the breakdown on the Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Book PDF page.
Time-per-Question Budget for the Aldehydes, Ketones and Carboxylic Acids Exemplar
This time map assumes you have already finished the NCERT chapter.
| Question Type | Problems | Avg. Minutes Each | Total Time |
|---|---|---|---|
| MCQ-I and MCQ-II | 18 | 3 to 5 | ~ 75 min |
| SA, Matching, Assertion-Reason | 28 | 5 to 8 | ~ 185 min |
| LA | 4 | 20 to 25 | ~ 90 min |
| Whole chapter | 50 | - | ~ 6 hours |
Aldehydes, Ketones and Carboxylic Acids Top Reactions to Memorise Before Attempting the Exemplar
Most Exemplar problems hinge on a small set of recurring named reactions. Lock these five into memory before opening the PDF.
| Concept | Reaction / expression |
|---|---|
| Rosenmund reduction | RCOCl + H2 → RCHO + HCl (Pd/BaSO4; partial poisoning by S/quinoline) |
| Nucleophilic addition of HCN | R2C=O + HCN → R2C(OH)CN (cyanohydrin; rate: HCHO > RCHO > R2CO) |
| Aldol condensation (self, base-catalysed) | 2 CH3CHO → CH3CH(OH)CH2CHO → CH3CH=CHCHO + H2O |
| Cannizzaro reaction (no alpha-H) | 2 HCHO + conc. NaOH → CH3OH + HCOONa |
| Hell-Volhard-Zelinsky reaction | RCH2COOH + Cl2 / red P → RCHClCOOH + HCl |
Full master table: Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry Formula Sheet
Aldehydes, Ketones and Carboxylic Acids CBSE Marks Weightage Compared Across Class 12 Chemistry Chapters
The visual below maps typical CBSE marks across all 10 chapters of the 2026-27 NCERT, averaged over the last five board papers. The numbers match the weightage bullets at the top of this page.
Student Feedback
In a Collegedunia poll of 900 Class 12 students, 78% said the Exemplar's MCQ-II and acidity-ordering problems on this chapter were the toughest to crack before the boards.
Other Resources for Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Exemplar Book PDF
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Solutions
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry Notes
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry Formula Sheet
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Book PDF
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Exemplar Solutions
- Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry Handwritten Notes
NCERT Exemplar Book PDF for Class 12 Chemistry: All Chapters
Bookmark this table for chapterwise access. Every link points to the official 2026-27 Exemplar PDF on its Collegedunia page.
| Chapter | Resource |
|---|---|
| Chapter 1 | Solutions NCERT Exemplar Book PDF |
| Chapter 2 | Electrochemistry NCERT Exemplar Book PDF |
| Chapter 3 | Chemical Kinetics NCERT Exemplar Book PDF |
| Chapter 4 | The d- and f-Block Elements NCERT Exemplar Book PDF |
| Chapter 5 | Coordination Compounds NCERT Exemplar Book PDF |
| Chapter 6 | Haloalkanes and Haloarenes NCERT Exemplar Book PDF |
| Chapter 7 | Alcohols, Phenols and Ethers NCERT Exemplar Book PDF |
| Chapter 9 | Amines NCERT Exemplar Book PDF |
| Chapter 10 | Biomolecules NCERT Exemplar Book PDF |
Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Exemplar Book PDF FAQs
Ques. Where can I download the Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Exemplar Book PDF?
Ans. You can download the Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Exemplar Book PDF 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 refreshed when the textbook was trimmed and renumbered. The Exemplar still labels the chapter as "Unit 12 Aldehydes, Ketones and Carboxylic Acids", but the content maps directly to the new Chapter 8 in the 2026-27 textbook. A small minority of problems touch the trimmed industrial-process detail and can be skipped during board preparation.
Ques. Why does the Exemplar call it Chapter 12 while the new textbook says Chapter 8?
Ans. The Exemplar publication still follows the legacy pre-rationalisation chapter numbering. The 2026-27 textbook collapsed 16 chapters into 10, so what used to be Chapter 12 Aldehydes, Ketones and Carboxylic Acids is now Chapter 8. The chapter content is the same; only the chapter number differs between the two books.
Ques. How many pages is the Class 12th Chemistry Chapter 8 Exemplar Book PDF?
Ans. The Aldehydes, Ketones and Carboxylic Acids Exemplar PDF runs approximately 12 pages and packs 50 HOTS problems across MCQ-I, MCQ-II, SA, Matching, Assertion-Reason, and LA types.
Ques. How many problems does the Aldehydes, Ketones and Carboxylic Acids chapter of the Exemplar contain?
Ans. The chapter holds 50 problems in total, split as MCQ-I (12), MCQ-II (6), SA (19), Matching (4), Assertion-Reason (5), and LA (4).
Ques. Are Aldehydes, Ketones and Carboxylic Acids 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 from this chapter in 5 of the last 5 board papers. For an A1 grade in Chemistry, working the Exemplar for this chapter is practically required.
Ques. Where can I find the solutions to the Aldehydes, Ketones and Carboxylic Acids Exemplar problems?
Ans. Worked answers for every problem in this chapter are on the Aldehydes, Ketones and Carboxylic Acids Class 12 Chemistry NCERT Exemplar Solutions page.
Ques. How long does it take to finish the Aldehydes, Ketones and Carboxylic Acids chapter of the Exemplar Book?
Ans. Plan for around 6 hours spread across four to five sittings: roughly 1.25 hours for the MCQ-I and MCQ-II types, around 3 hours for the SA, Matching, and Assertion-Reason set, and the rest for the LA section. Revisit any wrong attempts the same day to lock in the correction.
Ques. Can I use the Exemplar Book for JEE Main and NEET Aldehydes Ketones Carboxylic Acids preparation?
Ans. Yes, this is the single highest-yield NCERT publication for the chapter in entrance exams. JEE Main 2024 and 2025 each carried at least two Aldehyde/Ketone/Acid questions whose setups mirrored Exemplar problems (substituted-acid acidity ordering, cross-aldol products, distinguishing tests by single reagent). NEET also reuses Exemplar Assertion-Reason patterns on Cannizzaro selectivity and inductive-effect ordering for fluoro- vs chloro-substituted acids.
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