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The Central Board of Secondary Education (CBSE) conducted one of the most important exam papers for science stream students, i.e., Chemistry on February 27, 2025. The CBSE Class 12 Chemistry exam 2025 was held in a single shift from 10:30 AM to 1:30 PM. Students can now access the CBSE Class 12 Chemistry Answer Key 2025 Set 1, 2, 3 and CBSE Class 12 Chemistry Question Paper 2025 PDF for all sets. The initial analysis suggests that the exam was of the moderate difficulty level. The detailed CBSE Class 12 chemistry exam 2025 analysis is given below.
CBSE Class 12 Chemistry Question Paper & Answer Key 2025
After exiting the exam hall, all students try to find solutions of the board paper on the internet to check whether they answered questions right or not. That is why, we at Adda247 offers the CBSE Class 12th chemistry answer key 2025 for all question paper sets so that students can check correct answers of all questions. The experienced subject teachers prepares the CBSE Class 12 Chemistry answer key 2025 after the exam to help students who took the board exam.
CBSE Class 12 Chemistry Paper 2025 Highlights
The Class 12 Chemistry question paper by CBSE aimed to assess students’ grasp of concepts, ability to solve problems, and knowledge application. Main points to note include:
- Section A: Multiple Choice Questions (20% of the paper)
- Section B: Short Answer Questions
- Section C: Long Answer Questions
- Section D: Numerical & Application-Based Questions (40% of the paper)
The distribution of questions adhered to the CBSE sample papers, ensuring that students who properly studied with NCERT and past years’ papers could take the exam with assurance.
CBSE Class 12th Chemistry Answer Key 2025 for All Sets
The CBSE Class 12th Chemistry paper solutions has been prepared by the highly experienced chemistry teachers, ensuring students get detailed and correct solutions for every questions. The experts go through all question paper sets and creates the answer key separately for every set. Students can access the CBSE Class 12 chemistry questions and solutions for all sets below.
CBSE Class 12th Chemistry Questions & Answer Key 2025 Set 1
Section A
| Question No. | Question | Options | Correct Answer |
| 1 | The charge required for the reduction of 1 mol of MnO4− to MnO2 is | (A) 1 F, (B) 3 F, (C) 5 F, (D) 6 F | (B) 3 F |
| 2 | Which among the following is a false statement? | (A) Rate of zero-order reaction is independent of the initial concentration of the reactant.
(B) Half-life of a zero-order reaction is inversely proportional to the rate constant. (C) Molecularity of a reaction may be zero. (D) For a first-order reaction, t1/2 = 0.693/k. |
(C) Molecularity of a reaction may be zero. |
| 3 | The number of molecules that react with each other in an elementary reaction is a measure of the | (A) the activation energy of the reaction, (B) stoichiometry of the reaction, (C) the molecularity of the reaction, (D) order of the reaction. | (C) molecularity of the reaction |
| 4 | The element having [Ar] 3d10 4s2 electronic configuration is | (A) Cu, (B) Zn, (C) Cr, (D) Mn | (B) Zn |
| 5 | The complex ions [Co(NH3)5(NO2)]2+ and [Co(NH3)5(ONO)]2+ are called | (A) Ionization isomers, (B) Linkage isomers, (C) Co-ordination isomers, (D) Geometrical isomers | (B) Linkage isomers |
| 6 | The diamagnetic species is: | (A) [Ni(CN)4]2−, (B) [NiCl4]2−, (C) [Fe(CN)6]3−, (D) [CoF6]3− | (A) [Ni(CN)4]2− |
| 7 | Which is the correct IUPAC name for the given compound?
|
(A) Methylchlorobenzene, (B) Toluene, (C) 1-Chloro-4-Methylbenzene, (D) 1-Methyl-4-Chlorobenzene | (C) 1-Chloro-4-Methylbenzene |
| 8 | What will be formed after the oxidation reaction of secondary alcohol with chromic anhydride (CrO3)? | (A) Aldehyde, (B) Ketone, (C) Carboxylic acid, (D) Ester | (B) Ketone |
| 9 | The conversion of phenol to salicylic acid can be accomplished by | (A) Reimer-Tiemann reaction, (B) Friedel-Crafts reaction, (C) Kolbe reaction, (D) Coupling reaction | (A) Reimer-Tiemann reaction |
| 10 | Which of the following is/are examples of denaturation of protein? | (A) Coagulation of egg white, (B) Curdling of milk, (C) Clotting of blood, (D) Both (A) and (B) | (D) Both (A) and (B) |
| 11 | Nucleotides are joined together by | (A) Glycosidic linkage, (B) Peptide linkage, (C) Hydrogen bonding, (D) Phosphodiester linkage | (D) Phosphodiester linkage |
| 12 | Scurvy is caused due to deficiency of | (A) Vitamin B1, (B) Vitamin B2, (C) Ascorbic acid, (D) Glutamic acid | (C) Ascorbic acid |
| 13 | Assertion (A): In a first-order reaction, if the concentration of the reactant is doubled, its half-life is also doubled.
Reason (R): The half-life of a reaction does not depend upon the initial concentration of the reactant in a first-order reaction. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A). (C) Assertion (A) is true, but Reason (R) is false. (D) Assertion (A) is false, but Reason (R) is true. |
(D) Assertion (A) is false, but Reason (R) is true. |
| 14 | Assertion (A): Aromatic primary amines cannot be prepared by Gabriel Phthalimide synthesis.
Reason (R): Cu has a positive electrode potential. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A). (C) Assertion (A) is true, but Reason (R) is false. (D) Assertion (A) is false, but Reason (R) is true. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
| 15 | Assertion (A): Aromatic primary amines cannot be prepared by Gabriel Phthalimide synthesis.
Reason (R): Aryl halides do not undergo nucleophilic substitution reaction with the anion formed by phthalimide.
|
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A). (C) Assertion (A) is true, but Reason (R) is false. (D) Assertion (A) is false, but Reason (R) is true. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
| 16 | Assertion (A): Vitamin D cannot be stored in our body.
Reason (R): Vitamin D is a fat-soluble vitamin and is not excreted from the body in urine. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A). (C) Assertion (A) is true, but Reason (R) is false. (D) Assertion (A) is false, but Reason (R) is true. |
(D) Assertion (A) is false, but Reason (R) is true. |
Class 12 Chemistry Answer Key 2025 – Check Solutions & Download PDF
Students can get the detailed solutions for every question of CBSE Class 12 chemistry exam 2025 below in the video format.
CBSE Class 12 Chemistry Question Paper 2025
The CBSE releases the CBSE Class 12 chemistry board exam paper after the exam completion. By conducting an in-depth analysis of the CBSE Class 12 Chemistry Answer Key 2025, students can gain a comprehensive understanding of the kinds of questions presented in the examination across various sets and have an idea about what to expect in the upcoming CBSE board exams.
CBSE Class 12 Chemistry Question Paper 2025 PDF Download All Sets
Find the CBSE Class 12 Chemistry question paper 2025 free pdf for SETs 1, 2, and 3 available here. Students can use this question paper as a crucial resource for matching your answers with the expert-made answers provided here. Students can use this official question paper PDF as a source of preparation in future class 12 chemistry exams.
| CBSE Class 12th Chemistry Question Paper 2025 PDF Download | |
| Question Paper Set | PDF Download Link |
| Set 1 | Download PDF |
| Set 2 | Download PDF |
| Set 3 | Download PDF |
CBSE Class 12 Chemistry Exam Analysis 2025
According to early responses, the CBSE Class 12 Chemistry exam in 2025 had a moderate level of difficulty. The document featured an even combination of theoretical, quantitative, and practical questions. Although the majority of students considered the organic chemistry part to be simpler, a few indicated that the numerical problems in physical chemistry were challenging and needed a comprehensive grasp.
| CBSE 12th Chemistry Paper Analysis 2025 | |
| Particulars | Details |
| Overall Difficulty Level | Moderate |
| Difficulty Level of Section A | Easy to moderate |
| Difficulty Level of Section B | Easy to moderate |
| Difficulty Level of Section C | Easy to moderate |
| Difficulty Level of Section D | Moderate |
| Difficulty Level of Section E | Moderate to tough |
| Topics with Highest Weightage in Exam | Aldehydes, Ketones and Carboxylic Acids |
| Expected No. of Good Attempts | 55+ |
CBSE Class 12 Chemistry Answer Key 2025- Download All Sets PDF
Students will be provided with the accurate answers for every paper sets of the CBSE Class 12 Chemistry board exam 2025 in PDF below. Students can use the answers to know how well they performed in the exam. The CBSE releases the official answer key PDF in the marking scheme PDF after the results are announced. These solutions can also be used by students practicing for the next board exam.
How to Use CBSE Class 12 Chemistry Answer Key 2025
Students estimating their anticipated marks with the CBSE class 12 Chemistry answer key should consider the following factors, including
- Following the publication of the unofficial CBSE class 12 answer key, students should adhere to the marking scheme of the corresponding papers to determine their scores.
- The marks allocated to every question of the chemistry board paper is mentioned in front of the question itself.
- There is no negative marking for wrong answers.
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