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CBSE Class 12 Chemistry Answer Key 2026 will be available here for students who appeared in the board examination conducted on 28th February 2026 (10:30 AM to 1:30 PM). As one of the most important subjects for Science stream students, Chemistry plays a crucial role in overall board results.
After the CBSE Class 12 Chemistry Exam 2026 concludes, we will provide the detailed answer key and expert-verified solutions for all question paper sets. Students will be able to download the PDF for all sets and cross-check their responses to estimate their probable scores.
Stay connected for the latest updates, question paper PDF, and complete exam analysis.
| CBSE Class 12 Chemistry Exam 2026 | CBSE Class 12 Chemistry Question Paper 2026 |
CBSE Class 12 Chemistry Answer Key 2026: Key Highlights
Students who appeared for the CBSE Class 12 Chemistry Exam 2026 can check the important details related to the answer key, question paper, and exam schedule below. The table highlights key information to help students quickly understand all essential updates.
| Particulars | Details |
| Exam Name | CBSE Class 12 Board Examination 2026 |
| Conducting Authority | Central Board of Secondary Education (CBSE) |
| Subject | Chemistry |
| Exam Date | 28 February 2026 |
| Exam Timing | 10:30 AM to 1:30 PM |
| Question Paper Availability | Available after exam (All Sets) |
| Answer Key Release | To be updated soon |
| Answer Key Type | Unofficial (Prepared by Subject Experts) |
| Sets Covered | Set 1, Set 2, Set 3, Set 4 (All Sets) |
| Mode of Availability | PDF Download |
| Official Website | cbse.gov.in |
| Article Focus | Answer Key, Solutions, Question Paper, Exam Analysis |
CBSE Class 12 Chemistry Question Paper 2026
CBSE Class 12 Chemistry Question Paper 2026 is being conducted on 28th February 2026 from 10:30 AM to 1:30 PM. The question paper will be made available here after the exam concludes. Students will be able to download the paper for all sets. Stay connected for the latest updates and detailed exam analysis.
CBSE Class 12 Chemistry Question Paper 2026 (Updated Soon) |
CBSE Class 12 Chemistry Answer Key 2026
CBSE Class 12 Chemistry Answer Key 2026 will be available here soon, as the exam is currently being conducted. Once the examination concludes, we will provide the complete and accurate answer key for all sets. Students will be able to check their responses and estimate their scores easily. Stay tuned for the latest updates on the CBSE Class 12 Chemistry Answer Key 2026.
CBSE Class 12 Chemistry Answer Key - SET 2
SECTION A
| Q. No. | Question | Answer |
| 1 | Which of the following is most basic? | (C) MnO |
| 2 | Which of the following curve represents the first order reaction? |
(B) (The graph showing t1/2 is independent of [R]0) |
| 3 | Which of the following solutions will have the highest osmotic pressure? |
(B) 0.1 M CaCl2 (due to highest van't Hoff factor, i=3) |
| 4 | For a reaction: N2+3H2→2NH3 the rate of reaction with respect to NH3 is: | (D) +1/2(Δ[NH3/Δt] |
| 5 | How many Faradays are required to reduce 1 mol of Cr2O2−7 to Cr3+ in acidic medium? | (C) 6 |
| 6 | Which of the following Grignard Reagent will be used to prepare ....... |
(B) (Cyclohexyl magnesium bromide) |
| 7 | The secondary valency of Pt in [Pt(en)2Cl2]2+ is: |
(A) 6 (en is bidentate, so 2×2+2=6) |
| 8 | (CH3)3C−OC2H5 on reaction with HI gives: |
(C) (CH3)3C−I and C2H5−OH |
| 9 | Aniline on direct nitration yields: |
(C) 51%-para, 47%-meta, 2%-ortho |
| 10 | Which of the following is 'not' true about enantiomers? |
(B) They have the same specific rotation. |
| 11 | An example of non-reducing sugar is: | (B) Sucrose |
| 12 | Benzene diazonium chloride on reaction with phenol in weakly basic medium gives: | (D) p-hydroxyazobenzene |
| 13 | Assertion: -OH group in phenols is ortho-para directing. Reason: -OH group activates the ring. |
(A) Both true; Reason is correct explanation. |
| 14 | Assertion: Actinoids show irregularities in electronic configurations. Reason: 5f, 6d, and 7s orbitals have comparable energies. |
(A) Both true; Reason is correct explanation. |
| 15 | Assertion: Components of azeotropes are easily separated by fractional distillation. Reason: Azeotropes have the same composition in liquid and vapour phase. |
(D) Assertion is false; Reason is true. |
| 16 | Assertion: Two strands of DNA are complementary. Reason: Hydrogen bonds form between specific pairs of bases. |
(A) Both true; Reason is correct explanation. |
Section B
17. Ethanol and Acetone Mixture
-
Deviation: Shows positive deviation from Raoult's Law.
-
Reason: Ethanol molecules are hydrogen-bonded. Adding acetone breaks these interactions, making the escaping tendency of molecules higher than in pure state.
-
Boiling Point: The boiling point of the solution will decrease (as it forms a minimum boiling azeotrope).
18. Coordination Chemistry
(a) IUPAC Names:
- (i) [Ag(NH3)2][Ag(CN)2]: Diamminesilver(I) dicyanoargentate(I)
- (ii) K3[Fe(C2O4)3]: Potassium trioxalatoferrate(III)
OR
(b)
- (i) Test: Add BaCl2 solution. The sulfate isomer [Co(NH3)5Cl]SO4 will give a white precipitate (BaSO4), while the chloride isomer will not.
- (ii) Chelate effect: Increased stability of a complex due to the formation of rings by multidentate ligands. e.g., [Cu(en)2]2+.
19. Haloarenes Reactivity
Reason 1: Resonance effect leads to partial double bond character in the C-X bond, making it difficult to break.
Reason 2: sp2 hybridisation of carbon in C-X bond (shorter and stronger bond) or instability of phenyl cation.
20. Chemical Kinetics
Rate Change: Since volume is decreased to 1/3, concentration (C = n/V) becomes 3 times. For the rate law $Rate = k[A]2[B]1, the new rate = k[3A]2[3B] = 27 times original rate.
Order Change:No, the order of reaction remains unchanged by changes in volume or concentration.
21. Biomolecules Differentiation
(i) Amino Acids: Acidic have more carboxyl (-COOH) groups than amino groups; Basic have more amino (-NH2) groups than carboxyl groups.
(ii) Nucleotide vs. Nucleoside: A nucleoside contains only a sugar and a base; a nucleotide is a nucleoside plus a phosphate group.
CBSE Class 12 Chemistry Answer Key 2026 (Updated Soon) |
CBSE Class 12 Datesheet 2026 for Upcoming Exams
Students can check the CBSE Class 12th Datesheet 2026 for upcoming exams:
| Date | Subject (Timings: 10:30 am to 1:30 pm) |
| 02-Mar-2026 (Mon) | Urdu Elective; Sanskrit Elective; Carnatic Music (Vocal/Mel/Per); Kathak; Urdu Core; Front Office Operations; Insurance; Geospatial Technology; Electrical Technology |
| 03-Mar-2026 (Tue) | Legal Studies |
| 05-Mar-2026 (Thu) | PSYCHOLOGY |
| 06-Mar-2026 (Fri) | Punjabi; Bengali; Tamil; Telugu; Sindhi; Marathi; Gujarati; Manipuri; Malayalam; Odia; Assamese; Kannada; Arabic; Tibetan; German; Russian; Persian; Nepali; Limboo; Lepcha; Telugu (Telangana); Bodo; Tangkhul; Japanese; Bhutia; Spanish; Kashmiri; Mizo |
| 07-Mar-2026 (Sat) | Yoga, ELECTRONICS & HARDWARE |
| 09-Mar-2026 (Mon) | Mathematics; Applied Mathematics |
| 10-Mar-2026 (Tue) | Food Production; Office Procedures & Practices; Library & Information Science; Early Childhood Care & Education |
| 11-Mar-2026 (Wed) | HINDUSTANI MUSIC MEL INS, HINDUSTANI MUSIC PER INS, HEALTH CARE, DESIGN |
| 12-Mar-2026 (Thu) | English Elective / English Core |
| 13-Mar-2026 (Fri) | Tourism; Air-conditioning & Refrigeration |
| 14-Mar-2026 (Sat) | Home Science |
| 16-Mar-2026 (Mon) | Hindi Elective / Hindi Core |
| 17-Mar-2026 (Tue) | HINDUSTANI MUSIC VOCAL |
| 18-Mar-2026 (Wed) | Economics |
| 19-Mar-2026 (Thu) | Physical Activity Trainer |
| 20-Mar-2026 (Fri) | Marketing |
| 23-Mar-2026 (Mon) | Political Science |
| 24-Mar-2026 (Tue) | Retail, Artificial Intelligence |
| 25-Mar-2026 (Wed) | Informatics Practices; Computer Science; Information Technology |
| 27-Mar-2026 (Fri) | Biology |
| 28-Mar-2026 (Sat) | BUSINESS STUDIES, BUSINESS ADMINISTRATION |
| 30-Mar-2026 (Mon) | History |
| 01-Apr-2026 (Wed) | Financial Market Management; Agriculture; Medical Diagnostics; Salesmanship |
| 02-Apr-2026 (Thu) | National Cadet Corps (NCC); Food Nutrition & Dietetics |
| 04-Apr-2026 (Sat) | Sociology |
| 06-Apr-2026 (Mon) | Knowledge Tradition & Practices of India; Bhoti; Kokborok; Banking; Electronics Technology |
| 07-Apr-2026 (Tue) | Web Application |
| 08-Apr-2026 (Wed) | SANSKRIT CORE, FRENCH, TAXATION |
| 09-Apr-2026 (Thu) | MULTI-MEDIA, TEXTILE DESIGN, DATA SCIENCЕ |
| 10-Apr-2026 (Fri) | Legal Studies |
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