Class 12 Chemistry NCERT Important Questions 2026 – 2027

Central Board of Secondary Education (CBSE), this year made some important changes in the examination pattern of class 12. From introducing internal assessment in all subjects to changing the format of question paper for board exams, students must be aware of every minute detail of the changed examination pattern. Class 12 Chemistry NCERT Important Questions 2026 – 2027

As per the new exam pattern, CBSE has given more weight to the school-based/internal assessment. Major change will be observed in the questions paper format in the board exam 2026-2027. Question papers will have more number of objective type question.

CBSE changed the examination pattern with an aim to

• discourage students from rote learning
• develop analytical skills and reasoning abilities among students
• produce better results and improve the academic quality of institutions

I have given here some Important questions which is taken in accordance with the previous years papers.These are important questions , means whatever you read ,you can give this a preference || Important questions doesn’t mean Guaranteed questions so please consider this .Previous year I have Created similar kind of important questions and notes and 80-90% questions matches.

Important Changes in CBSE Class 12 Exam Pattern 2026

As per the new circular, CBSE class 12 syllabuswill not be reduced this year. In AY 2025-26, there will be around 25-27 questions in Science subjects i.e. Physics, Chemistry, Biology and Mathematics. The detailed changes are as follows:

• Multiple Choice Questions in English Language and Literature: In English Language & Literature, there will be multiple choice questions, fill in the blanks and synonym/antonym from unseen passages. 
• Assertion and Reason Based Questions in Biology: The board has eliminated the multiple-choice questions from Biology and has framed assertion and reason-based questions. There will be around 5 one-mark questions but it will be more of descriptive nature. Candidates are suggested not to write answers of one word form in Biology.

CBSE Class 12 Chemistry Deleted Syllabus 2026-27

The CBSE Class 12 Chemistry Deleted Syllabus 2026–27 includes the removal of several chapters and topics from both Organic and Physical Chemistry to reduce the academic load on students. As per the latest CBSE curriculum, complete chapters like Surface Chemistry, Polymers, p-Block Elements, Chemistry in Everyday Life, and General Principles and Processes of Isolation of Elements have been deleted.

Additionally, Organic Compounds Containing Nitrogen has been renamed as Amines (Unit 9), and topics such as Cyanides and Isocyanides have been removed from the syllabus. With these changes, CBSE has shifted focus towards high-scoring and conceptually important units like Electrochemistry, Chemical Kinetics, Coordination Compounds, Haloalkanes and Haloarenes, Alcohols Phenols and Ethers, helping students prepare more effectively for CBSE Class 12 Board Exams 2026.

🔢 No.	📘 Category	❌ Deleted / Modified Content (2026–27)
1	Complete Chapters Deleted	Surface Chemistry
		General Principles and Processes of Isolation of Elements
		p-Block Elements
		Polymers
		Chemistry in Everyday Life
2	Topics Modified / Renamed	Organic Compounds containing Nitrogen → Renamed as Amines (Unit 9)
3	Topics Removed	Cyanides and Isocyanides

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CBSE Class 12 Chemistry Marking Scheme 2026

CBSE 12th chemistry marking scheme includes both theoretical and practical exams, where 70 marks are for theory and 30 for practicals. To excel in the evaluation, students must grasp the grading system, important topics, exam format.

Sections	Type of Questions	No of Questions	Marks	Total Marks
A	MCQs	16	1 Mark Each	16
B	Very Short Answer Type Questions	5	2 Marks Each	10
C	Short Answer Type Questions	7	3 Marks Each	21
D	Case-Study Based Questions	2	4 Marks Each	8
E	Long Answer Type Questions	3	5 Marks Each	15
Total		33		70

Class 12th Chemistry Unit-Wise Weightage

Unit	Unit Name	Marks
I	Solutions	7
II	Electrochemistry	9
III	Chemical Kinetics	7
IV	d- and f-Block Elements	7
V	Coordination Compounds	7
VI	Haloalkanes and Haloarenes	6
VII	Alcohols, Phenols and Ethers	6
VIII	Aldehydes, Ketones and Carboxylic Acid	8
IX	Amines	6
X	Biomolecules	7
Total		70 Marks

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CBSE Class 12 Chemistry NCERT Important Questions

Focus on Electrochemistry, Chemical Kinetics, Coordination Compounds, Haloalkane & Haloarene, Alcohol Phenol Ether as these chapters are highly scoring and frequently asked in CBSE board exams.

📘 Chapter	🔎 Examples	📖 Intext Questions	📝 Exercise Questions	⭐ Important Notes
Solution	Example 2.5	Intext 2.7, 2.9	Exercise 2.8, 2.12, 2.23, 2.41, 2.35, 2.25, 2.16	–
Electrochemistry	Example 3.4, 3.9	Intext 3.1, 3.6, 3.7	Exercise 3.5, 3.13, 3.7, 3.19	–
Chemical Kinetics	Example 4.5, 4.6, 4.11	Intext 4.7	Exercise 4.11, 4.15, 4.27, 4.18, 4.20	–
D & F Block Elements	Example 8.5, 8.9	Intext 8.8, 8.10	Exercise 8.1, 8.7, 8.16, 8.26, 8.15, 8.30	–
Coordination Compounds	–	Intext 9.2, 9.3, 9.5, 9.7	Exercise 9.21, 9.22, 9.26, 9.31, 9.9, 9.4, 9.19, 9.12, 9.17, 9.18, 9.16	–
Haloalkane & Haloarene	Example 10.7	Intext 10.5, 10.9, 10.6	Exercise 10.5, 10.14, 10.19	SN1 & SN2 reactions very important
Alcohol, Phenol & Ether	Example 11.4, 11.5	Intext 11.5, 11.9, 11.3, 11.12	Exercise 11.18, 11.21, 11.8, 11.25, 11.32, 11.31, 11.11	–
Aldehyde, Ketone & Carbohydrate	Example 12.4, 12.5, 12.1	Intext 12.7	Exercise 12.13, 12.16, 12.17, 12.1, 12.10	–
Amines	Example 13.5, 13.4	Intext 13.4	Exercise 13.4, 13.7, 13.9, 13.11	–
Biomolecules	–	–	Exercise 14.9, 14.10, 14.12, 14.22, 14.24	–

IMPORTANT QUESTIONS OTHER THAN NCERT PDF

BEST BOOKS FOR CLASS 12 BOARDS

1. NCERT- https://amzn.to/2Wr6c9n
2. Sample paper – https://amzn.to/2qw9vOY
3. Previous year solved paper – https://amzn.to/2qJnHnJ
4. Best Guide Book ( Recommended) – https://amzn.to/37zUjRc
5. Previous year iit jee/jee mains- https://amzn.to/2EBo9bw