CBSE Class 12th Chemistry Question Paper 2025, Exam Pattern, Marking Scheme

Edited By Vishal kumar | Updated on Mar 15, 2025 12:22 PM IST | #CBSE Class 12th

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CBSE Class 12th Exam Date : 01 Apr' 2025 - 01 Apr' 2025

The CBSE Class 12 Board Exams 2025 are conducted by the Central Board of Secondary Education (CBSE) for the students of the Science, Commerce, and Arts stream. The examinations are very significant for students in their academic and career lives, as their marks are considered for admission to colleges as well as in competitive exams like JEE, NEET, and CUET. Students have to read NCERT books thoroughly, practice previous year's papers, and take mock tests to perform better in exams. Conceptual clarity and time management are the mantras to get a high mark.

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CBSE Class 12th Chemistry Question Paper 2025, Exam Pattern, Marking Scheme

CBSE Chemistry Question Paper 2025 Class 12 – Overview

CBSE Class 12 Chemistry 2025 exam is a high-scoring paper for Science Stream students, and this paper serves as a basis for higher studies pertaining to pharmacy, medicine, engineering, and research. The knowledge of students in terms of Physical, Organic, and Inorganic Chemistry is tested through this paper, and the syllabus includes Electrochemistry concepts, Chemical Kinetics, Coordination Compounds, Organic Reactions, and Polymers.

This examination is very important for those students who are preparing for competitive exams like JEE, NEET, CUET, and other entrance exams because Chemistry forms the bulk of these exams. A clear understanding of the subject enhances problem-solving and scientific thinking.

Exam Details	Information
Exam Date	February 27, 2025
Exam Mode	Pen and Paper (Offline)
Marks Distribution	70 Marks (Theory) + 30 Marks (Practical)

To excel, students need to pay extra attention to NCERT textbooks, last year's question papers, sample papers, and numerical problems. Conceptual clarity and time management will be the key to success in the exam.

This article will help the CBSE Class 12 students prepare well for the Chemistry Exam 2025 by providing a detailed exam pattern, marking scheme, key topics, and preparation advice. It will help students develop an understanding of the question paper pattern, conceptual understanding, numerical, and key topics. Apart from this, it provides advice on time management and past years' exam trends to help in confidence-building and performance improvement

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CBSE Chemistry Exam Pattern 2025

The CBSE Class 12 Chemistry Exam 2025 is systematic to assess the clarity of concepts, application ability, and problem-solving ability of students. The exam pattern is as provided below:

Exam Detail	Information
Number of Sections	Three (Section A, Section B, Section C)
Types of Questions	MCQs, Short-Answer, Long-Answer, Case-Based
Marking Scheme	70 Marks (Theory) + 30 Marks (Practical)
Exam Duration	3 Hours (180 Minutes)

Key Takeaways of the Paper

MCQs & Objective Questions examine fundamental concepts and definitions.
Short-answer questions assess problem-solving and explanation ability.
Long-answer & Case-Based Questions stress application, reasoning, and experimental analysis.
Internal Choice is provided in some questions to provide response flexibility.

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Class 12 CBSE Chemistry Question Paper 2025 PDF

Students can download the CBSE 12 chemistry question paper PDF here. The question paper PDF link will be activated just after the exam which is scheduled on February 27, 2025.

Question Paper	Download PDF
CBSE Class 12 Chemistry question paper 2025	Click Here

CBSE Class 12 Chemistry 56/2/1, Set 1 Paper and Answer Key

Check CBSE 12 chemistry 56/2/1, set 1 answer key along with question is given below.

1. The charge required for the reduction of 1 mol of ${MnO}_{4}^{-}$ to ${MnO}_{2}$ is
(A) 1 F
(Q) 5 F
(B) 3 F
(D) 6 F

Answer: (B) 3 F

2. Which among the following is a false statement?
(A) Rate of zero order reaction is independent of initial concentration of 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, $t_{1 / 2} = 0.693 / k$ .

Answer: (C) Molecularity of a reaction may be zero. (False statement)

3. The number of molecules that react with each other in an elementary reaction is a measure of the :
(A) activation energy of the reaction (B) stoichiometry of the reaction
(Q) molecularity of the reaction
(D) order of the reaction

Answer: (C) Molecularity of the reaction

4. Thgelement having [Ar]3d $^{10} 4 s^{1}$ electronic configuration is
(2) Cu
(B) Zn
(C) Cr
(D) Mn

Answer: (A) Cu

5. The complex ions ${[Co {({NH}_{3})}_{5} ({NO}_{2})]}^{2 +}$ and ${[Co {({NH}_{3})}_{5} (ONO)]}^{2 +}$ are called
(A) Ionization isomers
(B) Linkage isomers
(C) Co-ordination isomers
(D) Geometrical isomers

Answer: (B) Linkage isomers

6. The diamagnetic species is :
(A) ${[Ni (CN)_{4}]}^{2 -}$
(B) ${[{NiCl}_{4}]}^{2 -}$
(C) ${[Fe (CN)_{6}]}^{3 -}$
(D) ${[{CoF}_{6}]}^{3 -}$

Answer: (A) ${[Ni (CN)_{4}]}^{2 -}$

7. Which is the correct IUPAC name for

(A) Methylchlorobenzene
(B) Toluene
(C) 1-Chloro-4-Methylbenzene
(D) 1-Methyl-4-Chlorobenzene

Answer: (C) 1-Chloro-4-Methylbenzene

8. What will be formed after oxidation reaction of secondary alcohol with chromic anhydride $({CrO}_{3})$ ?
(A) Aldehyde
(B) Ketone
(C) Carboxylic acid
(D) Ester

Answer: (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

Answer: (C) Kolbe 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)

Answer: (D) Both (A) and (B)

11. Nucleotides are joined together by
(A) Glycosidic linkage
(B) Peptide linkage
(C) Hydrogen bonding
(D) Phosphodiester linkage

Answer: (D) Phosphodiester linkage

CBSE Class 12 Chemistry 56/2/2, Set 2 Paper and Answer Key

For questions number 1 to 4, two statements are given - one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (A), (B), (C) and (D) as given below :
(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 the Assertion (A).
(C) Assertion (A) is true, but Reason (R) is false.
(D) Assertion (A) is false, but Reason (R) is true.

1. Assertion (A) : Vitamin D cannot be stored in our body.

Reason (R) : Vitamin D is fat soluble vitamin and is not excreted from the body in urine.

2. 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)

3. Assertion (A) : Cu cannot liberate $H_{2}$ on reaction with dilute mineral acids.
Reason (R) : Cu has positive electrode potential.

4. 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.

5. Scurvy is caused due to deficiency of
(A) Vitamin B1
(B) Vitamin B2
(C) Ascorbic acid
(D) Glutamic acid

6. Nucleotides are joined together by
(A) Glycosidic linkage
(B) Peptide linkage
(C) Hydrogen bonding
(D) Phosphodiester linkage

7. 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)

8. 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

9. What will be formed after oxidation reaction of secondary alcohol with chromic anhydride $({CrO}_{3})$ ?
(A) Aldehyde
(B) Ketone
(C) Carboxylic acid
(D) Ester

CBSE Class 12 Chemistry 56/2/3, Set 3 Paper and Answer Key

1. Which among the following is a false statement ?
(A) Rate of zero order reaction is independent of initial concentration of 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, $t_{1 / 2} = 0.693 / k$ .

2. The charge required for the reduction of $1 {mol}^{of} {MnO}_{4}^{-}$ to ${MnO}_{2}$ is
(A) 1 F
(B) 3 F
(C) 5 F
(D) 6 F

3. The element having $[Ar] 3 d^{10} 4 s^{1}$ electronic configuration is
(A) Cu
(B) Zn
(C) Cr
(D) Mn

4. The number of molecules that react with each other in an elementary reaction is a measure of the :
(A) activation energy of the reaction

(B) stoichiometry of the reaction
(C) molecularity of the reaction
(D) order of the reaction

5. The diamagnetic species is :
(A) ${[Ni (CN)_{4}]}^{2 -}$
(B) ${[{NiCl}_{4}]}^{2 -}$
(C) ${[Fe (CN)_{6}]}^{3 -}$
(D) ${[{CoFF}_{6}]}^{3 -}$

[At. No. $Co = 27, Fe = 26, Ni = 28$ ]

6. The complex ions ${[Co {({NH}_{3})}_{5} ({NO}_{2})]}^{2 +}$ and ${[Co {({NH}_{3})}_{5} (ONO)]}^{2 +}$ are called
(A) Ionization isomers
(B) Linkage isomers
(C) Co-ordination isomers
(D) Geometrical isomers

Important Topics For CBSE Chemistry 2025

CBSE Class 12 Chemistry Exam 2025 has three key sections: Physical Chemistry, Inorganic Chemistry, and Organic Chemistry. The following are the most significant topics that the students have to practice for better scoring.

1. Physical Chemistry

Solid State – Crystal structures, Packing efficiency, Defects in solids.
Solutions – Raoult’s law, Colligative properties, Van’t Hoff factor.
Electrochemistry – Nernst equation, Conductance, Electrochemical cells.
Chemical Kinetics – Rate law, Arrhenius equation, Order & Molecularity.
Surface Chemistry – Adsorption, Catalysis, Colloids, Emulsions.

2. Inorganic Chemistry

Isolation of Elements – Metallurgy, Extraction of metals, Refining.
p-Block Elements – Group 15-18 elements, Oxoacids, Allotropes.
d- and f-Block Elements – Transition Elements, Properties, Lanthanoids & Actinoids.
Coordination Compounds – Nomenclature, Isomerism, Bonding theories.

3. Organic Chemistry

Haloalkanes and Haloarenes – SN1 & SN2 reactions, Preparation methods.
Alcohols, Phenols, and Ethers – Properties, Preparation, Reactions.
Aldehydes, Ketones, and Carboxylic Acids – Nucleophilic addition, Oxidation, Reduction.
Amines – Basicity, Preparation, Chemical reactions.
Biomolecules – Carbohydrates, Proteins, DNA, RNA.
Polymers – Classification, Polymerization types, Biodegradable polymers.
Chemistry in Everyday Life – Drugs, Cleansing agents, Food additives.

Key Areas of Concentration for 2025

Physical Chemistry Numericals (Electrochemistry, Solution, Chemical Kinetics)
Organic Chemistry Mechanisms (SN2, SN1, Electrophilic & Nucleophilic reactions)
Periodic Trends & Coordination Chemistry (p-block, d-block, and f-block elements)
NCERT-based conceptual understanding is required for theory & reactions.
Application-based and case-based questions can be expected.

Tips to Prepare for the CBSE Chemistry 2025 Exam

Following are some efficient preparation techniques through which students can perform well in the CBSE Class 12 Chemistry Exam 2025:

1. Familiarise yourself with Exam Patterns & Syllabus

Go through the CBSE syllabus and highlight important topics of Physical, Organic, and Inorganic Chemistry.
Understand the marking scheme and pattern of the question paper.

2. NCERT textbooks to Concentrate on

NCERT is the key – Read each chapter, theory, reactions, and numerical problems carefully.
All the board questions are directly framed from NCERT concepts.

3. Develop Key Reactions & Mechanisms

Remember major Organic Chemistry reactions, mechanisms, and conversions.
Emphasize the name reaction, its catalyst, and conditions.
Revise Periodic Trends, Coordination Compounds, and p/d-block elements.

4. Master Number Problems

Practice Numerical questions from:

Electrochemistry – Conductivity, Nernst equation.
Chemical Kinetics – Half-life equations, Rate law.
Solutions – Molarity, Colligative properties.

5. Practice Sample Papers & Previous Year Papers

Practice sample papers & previous year questions of CBSE to understand trends & difficulty levels.
Focus on time management and develop answer-writing.

6. Practice Assertion-Reason Questions from a Case-Based Style

Get ready for 2025 case-based, assertion-reasoning, and application-based questions.
Strengthen conceptual understanding to respond rationally.

7. Revise Often & Note

Make brief notes of formulas, reactions, and main points.
Re-learn basic definitions, legislative statutes, and mathematical equations daily.

8. Time Management During Exam

Spend time on every section and do not waste too much time on one question.
Try the high-scoring & easier questions first to gain maximum marks.

9. Focus on Practical Chemistry

30 Practical marks – ensure Salt Analysis, Titration, and Organic Functional Group tests are accurately carried out.

Last Tip: Practice and consistency are key! Stick to a study schedule and stay calm for the best results.

CBSE Chemistry Marking Scheme 2025

Both theoretical and practical examinations are part of the CBSE 12th Chemistry marking scheme; theory exams are worth 70 marks, while practical exams are for 30. Students must understand the grading scheme, key subjects, and test structure in order to do well on the assessment.

Detailed Section-Wise Pattern

Section	Question Type	Number of Questions	Marks per Question	Total Marks
Section A	MCQs (Objective)	16	1	16
Section B	Short Answer Type I	5	2	10
Section C	Short Answer Type II	7	3	21
Section D	Long Answer Type	3	5	15
Section E	Case-Based Questions	2	4	8
Total	Complete Paper	33 Questions	-	70 Marks

A major shift from earlier years is a perceptible rise in the weightage of competency-based questions, such as MCQs, which now account for approximately 50% of the marks, whereas the weightage of short and long answer questions has been marginally decreased to approximately 30% - in line with the emphasis on application-based knowledge encouraged by the NEP 2020; the theory section continues to have 70 marks and the practical section continues to have 30 marks.

Important points regarding the changes:

Greater emphasis on competency-based questions:
There are more multiple-choice and application-based questions in the exam pattern.
Less weightage of conventional long answer questions:
The number of long descriptive questions has been reduced to give greater emphasis on a wider evaluation of concepts.
Greater emphasis on practical application:
The practical exam still retains a high 30% weightage, prompting students to implement theoretical knowledge in laboratory conditions.

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Questions related to CBSE Class 12th

Have a question related to CBSE Class 12th ?

Can I change my board from CBSE to CHSE Odisha in Class 12th?

Changing from the CBSE board to the Odisha CHSE in Class 12 is generally difficult and often not ideal due to differences in syllabi and examination structures. Most boards, including Odisha CHSE , do not recommend switching in the final year of schooling. It is crucial to consult both CBSE and Odisha CHSE authorities for specific policies, but making such a change earlier is advisable to prevent academic complications.

Read Complete Answer

Manasvini Gupta 30 January,2025

quartely question paper for mathematics cbse

Hello there! Thanks for reaching out to us at Careers360.

Ah, you're looking for CBSE quarterly question papers for mathematics, right? Those can be super helpful for exam prep.

Unfortunately, CBSE doesn't officially release quarterly papers - they mainly put out sample papers and previous years' board exam papers. But don't worry, there are still some good options to help you practice!

Have you checked out the CBSE sample papers on their official website? Those are usually pretty close to the actual exam format. You could also look into previous years' board exam papers - they're great for getting a feel for the types of questions that might come up.

If you're after more practice material, some textbook publishers release their own mock papers which can be useful too.

Let me know if you need any other tips for your math prep. Good luck with your studies!

Read Complete Answer

Jefferson 25 September,2024

i have taken admission in clg after my campartment exam in chemistry along with the neet 2025 preperation but unfortunately i again got campartment after doing all this preparation i got 15 marks only now I can't able to think what should I do next.

It's understandable to feel disheartened after facing a compartment exam, especially when you've invested significant effort. However, it's important to remember that setbacks are a part of life, and they can be opportunities for growth.

Possible steps:

Re-evaluate Your Study Strategies:
- Identify Weak Areas: Pinpoint the specific topics or concepts that caused difficulties.
- Seek Clarification: Reach out to teachers, tutors, or online resources for additional explanations.
- Practice Regularly: Consistent practice is key to mastering chemistry.
Consider Professional Help:
- Tutoring: A tutor can provide personalized guidance and support.
- Counseling: If you're feeling overwhelmed or unsure about your path, counseling can help.
Explore Alternative Options:
- Retake the Exam: If you're confident in your ability to improve, consider retaking the chemistry compartment exam.
- Change Course: If you're not interested in pursuing chemistry further, explore other academic options that align with your interests.
Focus on NEET 2025 Preparation:
- Stay Dedicated: Continue your NEET preparation with renewed determination.
- Utilize Resources: Make use of study materials, online courses, and mock tests.
Seek Support:
- Talk to Friends and Family: Sharing your feelings can provide comfort and encouragement.
- Join Study Groups: Collaborating with peers can create a supportive learning environment.

Remember: This is a temporary setback. With the right approach and perseverance, you can overcome this challenge and achieve your goals.

I hope this information helps you.

Read Complete Answer

Kanishka kaushikii 17 September,2024

i scored 84 percent in cbse 2 years ago.Am i eligible for medhavi scholarship if give 12th again after 2 drop years and will got 75+ in mpboard

Hi,

Qualifications:
Age: As of the last registration date, you must be between the ages of 16 and 40.
Qualification: You must have graduated from an accredited board or at least passed the tenth grade. Higher qualifications are also accepted, such as a diploma, postgraduate degree, graduation, or 11th or 12th grade.
How to Apply:
Get the Medhavi app by visiting the Google Play Store.
Register: In the app, create an account.
Examine Notification: Examine the comprehensive notification on the scholarship examination.
Sign up to Take the Test: Finish the app's registration process.
Examine: The Medhavi app allows you to take the exam from the comfort of your home.
Get Results: In just two days, the results are made public.
Verification of Documents: Provide the required paperwork and bank account information for validation.
Get Scholarship: Following a successful verification process, the scholarship will be given. You need to have at least passed the 10th grade/matriculation scholarship amount will be transferred directly to your bank account.

Scholarship Details:

Type A: For candidates scoring 60% or above in the exam.

Type B: For candidates scoring between 50% and 60%.

Type C: For candidates scoring between 40% and 50%.

Cash Scholarship:

Scholarships can range from Rs. 2,000 to Rs. 18,000 per month, depending on the marks obtained and the type of scholarship exam (SAKSHAM, SWABHIMAN, SAMADHAN, etc.).

Since you already have a 12th grade qualification with 84%, you meet the qualification criteria and are eligible to apply for the Medhavi Scholarship exam. Make sure to prepare well for the exam to maximize your chances of receiving a higher scholarship.

Hope you find this useful!

Read Complete Answer

Yuvan 30 August,2024

i upload 12th board result screenshot in ncweb form from the cbse site so it is valid

hello mahima,

If you have uploaded screenshot of your 12th board result taken from CBSE official website,there won,t be a problem with that.If the screenshot that you have uploaded is clear and legible. It should display your name, roll number, marks obtained, and any other relevant details in a readable forma.ALSO, the screenshot clearly show it is from the official CBSE results portal.

hope this helps.

Read Complete Answer

Ashvadha 12 July,2024

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CBSE Class 12th Chemistry Question Paper 2025, Exam Pattern, Marking Scheme

CBSE Chemistry Question Paper 2025 Class 12 – Overview

NEET/JEE Coaching Scholarship

JEE Main Important Mathematics Formulas

CBSE Chemistry Exam Pattern 2025

Key Takeaways of the Paper

Class 12 CBSE Chemistry Question Paper 2025 PDF

CBSE Class 12 Chemistry 56/2/1, Set 1 Paper and Answer Key

CBSE Class 12 Chemistry 56/2/2, Set 2 Paper and Answer Key

CBSE Class 12 Chemistry 56/2/3, Set 3 Paper and Answer Key

Important Topics For CBSE Chemistry 2025

1. Physical Chemistry

2. Inorganic Chemistry

3. Organic Chemistry

Key Areas of Concentration for 2025

Tips to Prepare for the CBSE Chemistry 2025 Exam

CBSE Chemistry Marking Scheme 2025

Detailed Section-Wise Pattern