Use this CBSE Class 12 Chemistry study material hub to prepare for the current Chemistry (Code 043) board course for 2026–27. The assessed theory syllabus contains 10 units, from Solutions to Biomolecules, with 70 marks of theory and 30 marks of practical assessment. XAM CONTENT currently has a verified Case Study resource for Solutions and a strong Class 12 Chemistry previous-year-paper collection; for the remaining chapters, this hub uses official NCERT and CBSE routes until more current internal resources are published.
| Unit | Current Unit | Marks |
|---|---|---|
| 1 | Solutions | 7 |
| 2 | Electrochemistry | 9 |
| 3 | Chemical Kinetics | 7 |
| 4 | The d- and f-Block Elements | 7 |
| 5 | Coordination Compounds | 7 |
| 6 | Haloalkanes and Haloarenes | 6 |
| 7 | Alcohols, Phenols and Ethers | 6 |
| 8 | Aldehydes, Ketones and Carboxylic Acids | 8 |
| 9 | Amines | 6 |
| 10 | Biomolecules | 7 |
| Total | 70 | |
| Unit | Chapter | Marks | XAM CONTENT | Official Text |
|---|---|---|---|---|
| 1 | Solutions Physical Chemistry |
7 | Case Study Questions | Chemistry Part-I |
| 2 | Electrochemistry Physical Chemistry |
9 | Use NCERT + PYQs while XAM CONTENT coverage is expanded | Chemistry Part-I |
| 3 | Chemical Kinetics Physical Chemistry |
7 | Use NCERT + PYQs while XAM CONTENT coverage is expanded | Chemistry Part-I |
| 4 | The d- and f-Block Elements Inorganic Chemistry |
7 | Use NCERT + PYQs while XAM CONTENT coverage is expanded | Chemistry Part-I |
| 5 | Coordination Compounds Inorganic Chemistry |
7 | Use NCERT + PYQs while XAM CONTENT coverage is expanded | Chemistry Part-I |
| 6 | Haloalkanes and Haloarenes Organic Chemistry |
6 | Use NCERT + PYQs while XAM CONTENT coverage is expanded | Chemistry Part-II |
| 7 | Alcohols, Phenols and Ethers Organic Chemistry |
6 | Use NCERT + PYQs while XAM CONTENT coverage is expanded | Chemistry Part-II |
| 8 | Aldehydes, Ketones and Carboxylic Acids Organic Chemistry |
8 | Use NCERT + PYQs while XAM CONTENT coverage is expanded | Chemistry Part-II |
| 9 | Amines Organic Chemistry |
6 | Use NCERT + PYQs while XAM CONTENT coverage is expanded | Chemistry Part-II |
| 10 | Biomolecules Organic / Biological Chemistry |
7 | Use NCERT + PYQs while XAM CONTENT coverage is expanded | Chemistry Part-II |
| Section | Question Type | Total Marks |
|---|---|---|
| A | 16 multiple-choice / objective questions × 1 mark | 16 |
| B | 5 very short-answer questions × 2 marks | 10 |
| C | 7 short-answer questions × 3 marks | 21 |
| D | 2 case-based questions × 4 marks | 8 |
| E | 3 long-answer questions × 5 marks | 15 |
| Total | 70 | |
Chemistry marks are often lost because of an incorrect equation, missing condition, wrong sign/unit, incomplete reasoning, unsuitable reagent, incorrect structure or an unbalanced reaction. After solving the official SQP or a PYQ, identify the first incorrect step rather than only checking the final answer.
| Practical Component | Marks |
|---|---|
| Volumetric Analysis | 8 |
| Salt Analysis | 8 |
| Content-Based Experiment | 6 |
| Project Work | 4 |
| Class Record and Viva | 4 |
| Total | 30 |
1. What is the molarity of a solution containing 0.50 mol solute in 2.0 L of solution?
Answer: 0.25 mol L⁻¹, because molarity = moles of solute ÷ volume of solution in litres.
2. If the standard cell potential is positive, what does this indicate about the cell reaction under standard conditions?
Answer: The reaction is thermodynamically spontaneous in the written direction under standard conditions because ΔG° = −nFE°cell.
3. For a first-order reaction, what happens to the half-life when the initial concentration is doubled?
Answer: It remains unchanged. For a first-order reaction, t₁/₂ = 0.693/k and is independent of initial concentration.
4. Why are many transition-metal ions coloured?
Answer: In many transition-metal ions, partially filled d orbitals can undergo electronic transitions by absorbing particular wavelengths of visible light, producing characteristic colours.
5. Which reacts faster by an SN1 mechanism: tert-butyl chloride or ethyl chloride, and why?
Answer: tert-Butyl chloride, because the SN1 route involves carbocation formation and a tertiary carbocation is much more stable than a primary carbocation.
6. Why are amino acids described as bifunctional compounds?
Answer: They contain both an amino group and a carboxyl group, so they possess both basic and acidic functional characteristics.
How many units are there in the current CBSE Class 12 Chemistry theory syllabus?
The current 2026–27 theory syllabus contains 10 assessed units, from Solutions through Biomolecules.
What are the theory and practical marks?
Chemistry carries 70 marks of theory and 30 marks of practical assessment.
Which Chemistry unit has the highest marks?
Electrochemistry carries 9 marks, the highest single-unit allocation in the current theory structure.
Are Solid State and Surface Chemistry part of the current board syllabus?
No. They are not among the ten assessed theory units listed in the current 2026–27 CBSE Class 12 Chemistry curriculum.
What is the current Chemistry sample-paper format?
The current official SQP contains 33 questions across five sections: 16 one-mark, five 2-mark, seven 3-mark, two 4-mark case-based and three 5-mark long-answer questions.
What XAM CONTENT Chemistry resources are available right now?
A verified Case Study page is available for Solutions, and the Class 12 PYQ hub contains multiple 2025 Chemistry board-paper sets. More current chapterwise resources can be added to this hub as they are published.
