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CBSE 12th Chemistry Exam: The CBSE Class 12 Chemistry exam is scheduled for February 28, 2026 (Saturday). At this crucial time, students are focusing on last-minute revision and practice. During this phase of preparation, it becomes extremely important to practice sample papers and revise important questions to build confidence and improve time management.
For the CBSE Board Exam 2026, understanding the detailed question paper pattern is essential. The Class 12 Chemistry paper is divided into distinct sections comprising multiple-choice (MCQs), short-answer, long-answer, and case-based questions. To help students familiarize themselves with this exam pattern and practice the most important and expected questions, we have provided here a CBSE Class 12 Chemistry Sample Paper 2026 curated by subject experts.
This expert-designed sample paper is prepared strictly according to the latest CBSE syllabus and updated exam format. Answers and detailed solutions are also included to help students evaluate their preparation, identify weak areas, and improve accuracy. Students are advised to download and practice these important resources for effective preparation of the CBSE Class 12 Chemistry Exam 2026.
CBSE Class 12 Chemistry 2026: Key Highlights
Check the table below to know the key pointers of CBSE 12 Chemistry 2026:
| Overview | Details |
| Board Name: | Central Board of Secondary Examination (CBSE) |
| Class: | 12 |
| Subject: | Chemistry |
| Subject Code: | 043 |
| Exam Date | 28th February, 2026 |
| Exam Time | 10:15 AM to 1:30 PM |
| Total Marks: | 100 |
| Theory Marks: | 70 |
| Project Marks: | 30 |
| Exam Duration: | 3 Hours |
| Official Website: |
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| CBSE Class 12 Chemistry Top 50 MCQs for Board Exam 2026 | CBSE Class 12 Chemistry Topper Answer Sheet & Exam Writing Strategy |
Key Features of CBSE Class 12 Chemistry Sample Paper 2026
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Prepared by experts: Curated by experienced Chemistry educators.
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Latest exam pattern: Aligned with the current format (Physical, Organic, and Inorganic).
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High-weightage focus: Covers important and frequently asked questions.
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Detailed solutions: Includes step-by-step answers and organic reaction mechanisms.
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Effective revision: Ideal for self-assessment and last-minute practice.
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Builds confidence: Helps improve speed and time management.
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Syllabus aligned: Strictly based on the CBSE Class 12 Chemistry curriculum.
Check: CBSE Class 12 Chemistry REVISED Exam Pattern 2026
CBSE Class 12 Chemistry Sample Papers by Expert 2026
Time: 180 Minutes M.M.: 70
General Instructions:
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This Question paper contains - five sections A, B, C, D and E. Each section is compulsory.
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Section A has 16 multiple-choice questions of 1 mark each.
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Section B has 5 Very Short Answer (VSA)-type questions of 2 marks each.
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Section C has 7 Short Answer (SA)-type questions of 3 marks each.
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Section D has 2 source based/case based/passage based/integrated units of assessment (4 marks each) with sub parts.
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Section E has 3 Long Answer (LA)-type questions of 5 marks each.
CBSE Class 12 Chemistry Sample Papers by Expert 2026
SECTION A
| Sl.No. | Questions | Marks |
| 1. | Order of the photochemical reaction occurring between hydrogen and chlorine is (A) Second order (B) Third order (C) Zero order (D) First order | 1 |
| 2. | Which among the following is a synthetic element? (A) Pa (B) U (C) Fm (D) Th | 1 |
| 3. | The metabolism of hormones in human body is an example of (A) Second order reaction (B) First order reaction (C) Pseudo first order reaction (D) Pseudo second order reaction | 1 |
| 4. | The percentage of nickel in the alloy steel that is used for making pendulum is: (A) 19% (B) 36% (C) 0% (D) 10% | 1 |
| 5. | The incorrect statement about interstitial compounds is: (A) They retain metallic conductivity. (B) They are very hard. (C) They are chemically reactive. (D) They have a high melting point. | 1 |
| 6. | Ethylidene chloride is a/an _______. (A) vic-dihalide (B) vinylic halide (C) gem-dihalide (D) allylic halide | 1 |
| 7. | C – Cl bond in chlorobenzene in comparison to C – Cl bond in methyl chloride is: (A) longer and stronger (B) shorter and weaker (C) longer and weaker (D) shorter and stronger | 1 |
| 8. | The conversion of an alkyl halide into alcohol by aqueous NaOH is classified as (A) a dehydrohalogenation reaction (B) a substitution reaction (C) an addition reaction (D) a dehydration reaction | 1 |
| 9. |
| 1 |
| 10. |
| 1 |
| 11. |
| 1 |
| 12. | Hinsberg's reagent is: (A) Benzene sulphonic acid (B) Benzene sulphonamide (C) Phenyl isocyanide (D) Benzene sulphonyl chloride | 1 |
| 13. | Assertion: Albumin is a globular protein. Reason: Polypeptide chain coils around to give a straight chain. (A) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion. (B) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion. (C) Assertion is true but Reason is false. (D) Assertion is false but Reason is true. | 1 |
| 14. | Assertion: Mg is not present in the enamel of human teeth. Reason: Mg is an essential element for the biological functions of humans. (A) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion. (B) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion. (C) Assertion is true but Reason is false. (D) Assertion is false but Reason is true. | 1 |
| 15. | Assertion: KCN reacts with methyl chloride to give methyl isocyanide. Reason: CN– is an ambident nucleophile. (A) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion. (B) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion. (C) Assertion is true but Reason is false. (D) Assertion is false but Reason is true. | 1 |
| 16. | Assertion: The boiling points of aldehydes and ketones are higher than hydrocarbons and ethers of comparable molecular masses. Reason: There is a weak molecular association in aldehydes and ketones arising out of the dipoledipole interactions. (A) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion. (B) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion. (C) Assertion is true but Reason is false. (D) Assertion is false but Reason is true. | 1 |
SECTION B
| Sl.No. | Questions | Marks |
| 17. | How is stability of coordination compounds determined in aqueous solution? | 2 |
| 18. | Name a ligand which is bidentate and give an example of the complex formed by this ligand. | 2 |
| 19. | Define molal elevation constant or ebullioscopic constant. OR Give an example of compound in which hydrogen bonding results in the formation of a dimer | 2 |
| 20. | (a) For which type of reactions, order and molecularity have the same value? (b) What is the order of radioactive decay? | 2 |
| 21. |
| 2 |
SECTION C
| Sl.No. | Questions | Marks | ||||||||||
| 22. | Write the chemical equation for all the steps involved in the rusting of iron. Give any one method to prevent rusting of iron. | 3 | ||||||||||
| 23. | Write electrode reactions taking place in Ni - Cd cell. Is it a primary or secondary cell? | 3 | ||||||||||
| 24. | In a pseudo first order hydrolysis of ester in water, the following results were obtained:
(a) Calculate the average rate of reaction between the time interval 30 to 60 seconds. (b) Calculate the pseudo first order rate constant for the hydrolysis of ester. | 3 | ||||||||||
| 25. | A first order reaction takes 20 minutes for 25% decomposition. Calculate the time when 75% of the reaction will be completed. Given: log 2 = 0.3010, log 3 = 0.4771, log 4 = 0.6021 | 3 | ||||||||||
| 26. |
| 3 | ||||||||||
| 27. |
| 3 | ||||||||||
| 28. |
| 3 |
SECTION D
| Sl.No. | Questions | Marks |
| 29. | Read the text carefully and answer the questions: A raw mango placed in concentrated salt solution loses water via osmosis and shrivels into pickles. Wilted flowers revive when placed in fresh water. A carrot that has become limp because of water loss into the atmosphere can be placed into the water making it firm once again. Water will move into its cells through osmosis. When placed in water containing less than 0.9% (mass/volume) salt, blood cells swell due to flow of water in them by osmosis. (a) People taking a lot of salt or salty food suffer from puffiness or edema. What is the reason behind this? (b) The preservation of meat by salting and of fruits by adding sugar protects against bacterial action. How? (c) Why does the direction of osmosis get reversed if a pressure larger than the osmotic pressure is applied to the solution side? Write its one application. OR What care is generally taken during intravenous injections and why? | 4 |
| 30. | Read the text carefully and answer the questions: The solutions which boil at a constant temperature like a pure liquid and possess the same composition in liquid, as well as vapour state are called azeotropes. The components of azeotropes cannot be separated by fractional distillation. Only nonideal solutions form azeotropes. Solutions with negative deviation form maximum boiling azeotrope and the solutions with positive deviation form minimum boiling azeotrope. The boiling point of azeotrope is never equal to the boiling points of any of the components of the azeotrope. (a) The azeotropic solutions of two miscible liquids show what type of deviation from Raoult's law? (b) The azeotropic mixture of water & HCI boils at 108.5° C. What type of deviation is shown by the solution? Does this solution behave as ideal or non-ideal? (c) Do ideal solutions form azeotropes? OR Out of pure liquid and azeotrope showing positive deviation, Which one has a higher boiling point? | 4 |
SECTION E
| Sl. No. | Questions | Marks |
| 31. | Attempt any five of the following: (a) Write the name of the component of starch which is water-soluble. (b) Define native state in reference to proteins. (c) How do you explain the presence of all six carbon atoms in glucose in a straight chain? (d) Which vitamin is linked with anti-sterility? (e) What is the structural feature characterising reducing sugars? (f) Write the main product of the following reactions: (g) What is the difference between a glycosidic linkage and a peptide linkage? | 5 |
| 32. | (a) Name the base that is found in nucleotides of RNA only. (b) Write uses of B-Complex. (c) Name the sugar present in milk. How many monosaccharide units are present in it? What are such oligosaccharides called? (d) What is the basic structural difference between glucose and fructose? (e) Give one example of each- Monosaccharide, disaccharide and polysaccharide. | 5 |
| 33. |
| 5 |
CBSE Class 12 Chemistry: Solutions of Sample Papers by Expert 2026
SECTION A
| Sl.No. | Answers | Marks |
| 1. | C | 1 |
| 2. | C | 1 |
| 3. | C | 1 |
| 4. | B | 1 |
| 5. | C | 1 |
| 6. | C | 1 |
| 7. | D | 1 |
| 8. | B | 1 |
| 9. | D | 1 |
| 10. | B | 1 |
| 11. | D | 1 |
| 12. | D | 1 |
| 13. | C | 1 |
| 14. | B | 1 |
| 15. | D | 1 |
| 16. | A | 1 |
We have provided the complete question paper and its solution in PDF format here. Students can download these important resources from the respective links given below:
CBSE Class 12 Chemistry Expert Sample Paper 2026 PDF |
CBSE Class 12 Exam Time Table 2026
The Central Board of Secondary Education (CBSE) has released the final Class 12 Date Sheet for the 2026 board exams, which are scheduled to be held from February 17 to April 10, 2026. The exams will be conducted in the traditional offline (pen and paper) format across designated centers in India and abroad. Students can directly download the official date sheet PDF from the CBSE website (cbse.gov.in) to better structure their study plans and strategically manage the gap days between subjects.
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