Important Chapters for CBSE Class 12 Chemistry Board Exam 2026

Preparing for the CBSE Class 12 Chemistry Board Exam 2026 can feel stressful because this subject has theory, reactions, numerical questions, and many concepts that need proper understanding. A lot of students find chemistry difficult, mainly because they try to study everything in the same way. A smarter method is to notice which chapters carry more marks and which ideas get repeated in almost every exam.

With simple planning and useful study tools like a CBSE class 12 chemistry question bank, helpful chemistry class 12 reference books, regular practice using a chemistry class 12 sample paper, and your class 12 chemistry NCERT book, you can prepare comfortably and score good marks without feeling overloaded.

This blog explains the most important chapters you need to focus on for the 2026 exam and also shares some easy study tips to help you learn in a better way.

Why It Helps to Know the Important Chapters?

Class 12 Chemistry has three main sections: Physical Chemistry, Organic Chemistry, and Inorganic Chemistry. Each one has different types of questions and a different level of difficulty. When you understand which chapters carry more marks, your study plan becomes clearer. This approach helps because:

• You can give more time to high-weightage chapters

• You avoid spending too much time on topics that hardly come up

• You understand which chapters need more practice

• You feel more confident while revising

• You study smartly instead of trying to memorise everything

The aim is not to leave any topic completely, but to focus more on the chapters that usually matter the most.

Most Important Chapters for CBSE Class 12 Chemistry Board Exam 2026

Here is a simple explanation of the chapters that need extra attention if you want to score higher.

1. Solutions

Solutions is a very scoring chapter in Physical Chemistry because it includes both theory and numerical questions. Important points are:

• Concentration terms

• Raoult’s law

• Ideal and non-ideal solutions

• Colligative properties

• Abnormal molar mass

If you understand the formulas well and practise numerical questions regularly, this chapter becomes very comfortable.

2. Electrochemistry

Electrochemistry carries good marks every year. Key topics include:

• Electrochemical cells

• Electrode potential

• Nernst equation

• Conductance

• Kohlrausch’s law

Many questions are direct and based on formulas, so with enough practice, you can score full marks.

3. Chemical Kinetics

This chapter is short, simple, and quite scoring. Important areas include:

• Rate of reaction

• Order and molecularity

• Integrated rate equations

• Factors affecting rate

• Activation energy

Since there are fewer formulas, you can revise this chapter many times easily.

4. The d- and f-Block Elements

This chapter appears almost every year. Make sure you learn:

• General properties of transition elements

• Oxidation states

• Colour and magnetic behaviour

• Lanthanides and actinides

Most questions are theory-based, so repeated revision will help a lot.

5. Coordination Compounds

This is one of the most important chapters in Inorganic Chemistry. Focus on:

• Nomenclature

• Ligands

• Coordination number

• Werner’s theory

• VBT and CFT

• Isomerism

This chapter needs understanding instead of memorising, so revise it slowly and calmly.

6. Haloalkanes and Haloarenes

This chapter is very important in Organic Chemistry. It includes:

• Nomenclature

• Chemical reactions

• Mechanism of nucleophilic substitution

• Uses and environmental effects

Mechanisms matter a lot here, so practise drawing them neatly.

7. Alcohols, Phenols, and Ethers

This chapter appears in most sample papers. Key topics include:

• Preparation methods

• Chemical reactions

• Distinguishing tests

With regular practice, you will easily understand the reaction patterns.

8. Aldehydes, Ketones, and Carboxylic Acids

This chapter is very common in board papers. Learn:

• Nomenclature

• Methods of preparation

• Chemical reactions

• Mechanisms

Organic chemistry may look confusing at first, but once you understand reaction trends, it becomes easier.

9. Biomolecules

Biomolecules is short, simple, and very scoring. Study:

• Carbohydrates

• Proteins

• Vitamins

• Nucleic acids

Most questions are direct and easy to attempt.

10. Polymers

This chapter is easy and scoring. Focus on:

• Types of polymers

• Methods of polymerisation

• Uses of polymers

Since many questions repeat almost every year, a few revisions are enough.

11. Chemistry in Everyday Life

This chapter usually appears in short-answer questions. Topics include:

• Medicines

• Cleansing agents

• Food preservatives

It is simple and easy to memorise.

Unit-Wise Weightage for Class 12 Chemistry (2026)

This table gives a simple idea of how marks are divided across the Chemistry syllabus.

The marks may vary slightly every year, but this gives a clear picture of which parts are usually more important.

How to Study These Chapters Effectively?

Here are some simple and practical study tips:

1. Start With NCERT

The class 12 chemistry ncert book is your main book. Every reaction, line, and table is important. Many board questions come directly from NCERT.

2. Solve a Good Question Bank

After finishing NCERT, practise more questions using a CBSE class 12 chemistry question bank to understand a variety of question types.

3. Use Helpful Reference Books

If you need clearer explanations or extra solved problems, use simple chemistry class 12 reference books to strengthen your concepts.

4. Practise Sample Papers

Solving a chemistry class 12 sample paper regularly helps you improve speed, accuracy, and confidence while showing you the real exam pattern.

5. Make Short Notes

Chemistry has many formulas and reactions. Short notes make revision faster and easy.

6. Revise Weekly

Weekly revision keeps concepts fresh in your memory, especially for Organic Chemistry.

Conclusion

The CBSE Class 12 Chemistry Board Exam 2026 becomes much easier when you know which chapters carry more marks and how to prepare for them. Chapters like Solutions, Electrochemistry, Chemical Kinetics, d- and f-Block Elements, Coordination Compounds, Haloalkanes, Alcohols, Aldehydes, Biomolecules, and Polymers should be revised properly.

With your class 12 chemistry ncert book, extra practice from a CBSE class 12 chemistry question bank, help from useful chemistry class 12 reference books, and regular practice of a chemistry class 12 sample paper, you can score well with confidence and calmness.

FAQs

1. Which chapter is the most important for Class 12 Chemistry?

Organic chapters like Aldehydes and Haloalkanes are very important.

2. Is NCERT enough for the exam?

Yes, NCERT is the main book and most questions follow it closely.

3. How many sample papers should I solve?

Try to solve around 8–10 sample papers before the final exam.

4. Which section is easiest: Physical, Organic, or Inorganic?

This depends on the student, but many students find Inorganic easier because it is mostly theory.

5. Is the Chemistry exam scoring?

Yes, Chemistry is scoring if you revise regularly and practise reactions and numerical questions.

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