New NCERT Class 10 Science Textbook 2026-27 (Revised Chapters)

NCERT book class 10th science textbook PDF is the only book for the academic session 2026-27 that covers all the three subjects i.e., Physics, Chemistry and Biology.

The book is thoughtfully designed keeping in mind conceptual clarity, scientific thinking, experimentation skills, numerical problem-solving and diagram understanding.

NCERT Class 10 Science Book PDF (2026-27)

NCERT class 10th Science book PDF aligns well with the latest CBSEs syllabus.

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Ch-wise links for download are given below, scroll down to access.

Class 10 Science NCERT Textbook Overview (2026-27)

Science NCERT Class 10 book PDF content helps students build a strong foundation through clear explanations, practical examples, and application-based learning. Additionally, resources provided by NCERT for Class 10 aims to provide students with conceptual clarity and supports efficient exam preparation. 

Key Highlights for Class 10th Science NCERT Textbook 

Some of the pointers which one should know about the NCERT Science textbook for class 10: 

• Single comprehensive book covering Physics, Chemistry, and Biology
• Includes in-text activities, experiments, and NCERT exercises
• Important questions, and practice material available
• Supports board exam preparation with focus on diagrams, chemical equations, numericals, and value-based questions

Science NCERT Class 10 Study Material

NCERT provides comprehensive and reliable study material for Class 10 Science for the 2026-27 academic session. These resources are designed to support effective exam preparation and are conveniently available in one place, ensuring easy access for students.

List of NCERT Class 10 Science Chapters

There are no deleted chapters mentioned in the Science class 10 textbook PDFs so far:

• Chemical Reactions & Equations
• Acids, Bases & Salts
• Metals and Non-metals
• Carbon & its Compounds
• Life Processes
• Control and Coordination
• How do Organisms Reproduce?
• Heredity
• Light – Reflection & Refraction
• The Human Eye & the Colourful World
• Electricity
• Magnetic Effects of Electric Current
• Our Environment
• ANSWERS

These textbooks follow rationalised content and remain unchanged for the 2026-27 session.

NCERT Class 10 Science Important Qs

Down below are some of the most important questions covering the entire Science syllabus.

Chapter 1: Chemical Reactions and Equations 

1. Which of the statements about the reaction below are incorrect?

2PbO(s) + C(s) → 2Pb(s) + CO₂(g)

(a) Lead is getting reduced.

(b) Carbon dioxide is getting oxidised.

(c) Carbon is getting oxidised.

(d) Lead oxide is getting reduced.

(i) (a) and (b) (ii) (a) and (c) (iii) (a), (b) and (c) (iv) all

Ans. (i) (a) and (b)

Chapter 2: Acids, Bases and Salts 

2. Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character?

Ans. Since in aqueous solutions acids dissociate in water to form H+ ions and get separated. This shows the acidic character of the compounds. Alcohol and glucose solution do not dissociate to form H+ ions. Therefore, they do not show acidic character.

Chapter 4: Carbon and its Compounds 

3. Ethane, with the molecular formula C2H6 has

(a) 6 covalent bonds.

(b) 7 covalent bonds.

(c) 8 covalent bonds.

(d) 9 covalent bonds.

Ans. (b) 7 covalent bonds.

Chapter 5: Life Process 

4. The kidneys in human beings are a part of the system for

(a) nutrition. (c) excretion.

(b) respiration. (d) transportation.

Ans. (c) Excretion

Chapter 6: Control and Coordination

5. How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?

Ans. The speed of a mimosa plant is different from the speed affected by the speed of stimulation of light. The speed of mimosa is called contractile speed, while the speed of shoots towards light is affected by the direction of stimulation of light. The plant appears to bend in the same direction from where light is received.

Chapter 8: Hereditary and Evolution

6. If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

Ans. In the given question we will see that trait B will be seen earlier. This happens because, in the case of an asexually reproducing population, the organisms will be the exact copy of their parents. Now if there is a mutation just in the case of trait A as we see, it will take time to appear in the population. Trait B being the majority will appear first.

7. One study showed that the parents of children with light colored eyes also have light colored eyes. On the basis of this, can we say whether the symptom of light colored eyes is effective or ineffective? Explain your answer.

Ans. On the basis of the above description we cannot say whether the light colored eye trait is dominant or recessive, as both the parents have light colored eyes. It may be that both the gene variants are recessive in the parent, so whether there is a second choice of eye color or not, the offspring was found to have light colored eyes. Considering the second assumption, it is shown that the light-colored eye symptom is dominant. Some children at this stage may have dark eyes, as the recessive symptom should be expressed in 1 in 4 children.

Chapter 11: Electricity

8. Why does the cord of an electric heater not glow while the heating element. Does it?

Ans. By Joule's law of heating, H ∝ R. Therefore, the resistance of the heating element is much higher than that of the heater cord. This gives more heat and makes this component better, whereas the cord of an electric heater does not.

Chapter  12: Magnetic Effects or Electric Current

9. Which of the following correctly describes the magnetic field near a long straight wire?

(a) The field consists of straight lines perpendicular to the wire.

(b) The field consists of straight lines parallel to the wire.

(c) The field consists of radial lines originating from the wire.

(d) The field consists of concentric circles centred on the wire.

Ans. (d) The field consists of concentric circles centred on the wire.

Chapter 13: Our Environment

10. What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?

Ans. Biological magnification is the phenomenon in which harmful chemicals enter in the food chain and its concentration increases at each tropic level. The levels of biological magnification are different at different levels of the ecosystem. It will be increased with each successive level. It is maximum at highest tropic levels and minimum at lowest tropic levels. For example, it is highest in humans and lowest in plants.

D. D. T. (0.02 ppm) → Water (5 ppm) → Algae (140 ppm) → Fish (1600 ppm) → Birds

How to Prepare for NCERT Class 10 Science 

Preparation for the Class 10 Science exam through NCERT textbooks can be structured and efficient by following these tips:

• Focus on NCERT Textbooks - Read every chapter thoroughly. Understand concepts, reactions, diagrams, and activities.
• Practice Diagrams & Equations - Draw and label all important diagrams (e.g., human eye, electric motor, nephron). Memorise and balance all chemical equations.
• Solve Numericals - Regularly practise numericals from Electricity, Light, and Chemical Reactions chapters.
• Solve Chapter-wise Questions - Use NCERT solutions to check answers and improve presentation as per CBSE marking scheme.
• Previous Year Papers & Sample Papers - Practise full-length papers to manage time and understand the exam pattern (80 marks theory + 20 marks internal assessment).
• Revise Regularly - Make short notes on key concepts, formulas, and reactions. Focus on frequently asked chapters like Heredity, Electricity, and Carbon Compounds.
• Do Not Skip Activities - NCERT in-text activities and examples are very important for conceptual clarity and board exams.

FAQs

Q1. What are the NCERT Science class 10 textbook pdfs?

Ans. There is only one main book - NCERT Science Textbook for Class 10 (English/ Hindi). You can download it from the official website or educational websites like Educart.

Q2. Are diagrams and numericals important in NCERT Class 10 Science?

Ans. Yes, diagrams carry 4-6 marks and numericals from Electricity, Light, and Chemical Reactions carry 8-10 marks every year. Practising all important diagrams with proper labelling and solving every numerical is the fastest way to score 90+.

Q3. Has the NCERT Class 10 Science textbook been fully revised under NEP for 2026-27?

Ans. No revision has been done for 2026-27. Full NEP-based revisions for Class 10 are expected from the 2027-28 session onwards.

Q4. How many chapters are there in NCERT science book Class 10?

Ans. There are a total of 16 chapters in the NCERT Class 10 Science textbook, covering Chemistry, Physics, and Biology.

Q5. Which are the most important chapters for Class 10 Science Board Exam 2027?

Ans. The highest-weightage chapters are:

• Heredity (Biology)
• Electricity (Physics)
• Carbon and its Compounds (Chemistry)
• Light: Reflection and Refraction
• How do Organisms Reproduce? 

These five chapters together cover nearly 40-45 marks in the board exam.