CBSE Session 2025-26 100% NCERT Aligned Theory: 80M + IA: 20M 13 Chapters

CBSE Class 10 Science Study Material (2025-26)

Complete Chapter Notes, NCERT Solutions, Important Questions & MCQs in Hindi & English Medium

📖 Curriculum & Exam Overview (पाठ्यक्रम एवं परीक्षा परिचय)

Welcome to the complete CBSE Class 10 Science portal for the 2025-26 academic session. Class 10 Science is a pivotal foundation for secondary board examinations and higher secondary streams (Medical, Engineering, and General Sciences). Our curriculum strictly adheres to the rationalized NCERT syllabus published by the National Council of Educational Research and Training and the latest CBSE marking blueprint. Each chapter below is organized into 5 dedicated learning formats: comprehensive conceptual notes with balanced chemical equations and experimental activities, rapid 5-minute revision summaries, complete NCERT in-text and exercise step-by-step solutions, high-yield board examination questions (VSA, SA, LA, and Case Studies), and timed interactive MCQ quizzes with instant result analytics.

CBSE कक्षा 10 विज्ञान (शैक्षणिक सत्र 2025-26) के आधिकारिक अध्ययन पोर्टल में आपका स्वागत है। कक्षा 10वीं विज्ञान बोर्ड परीक्षा में उत्कृष्ट अंक (95%+) प्राप्त करने और उच्चतर माध्यमिक (Science Stream) की नींव तैयार करने के लिए सबसे महत्वपूर्ण विषय है। यहाँ प्रस्तुत संपूर्ण पाठ्यक्रम NCERT द्वारा जारी नवीनतम पाठ्यक्रम और CBSE बोर्ड के अंक विभाजन पर आधारित है। छात्रों की संपूर्ण तैयारी के लिए प्रत्येक अध्याय को 5 प्रमुख भागों में विभाजित किया गया है: संतुलित रासायनिक समीकरणों व नामांकित चित्रों सहित विस्तृत नोट्स, परीक्षा पूर्व 5-मिनट रीविजन नोट्स, सभी 28+ पाठ्यनिहित व अभ्यास प्रश्नों के चरणबद्ध NCERT समाधान, 10 वर्षों के बोर्ड पेपर्स पर आधारित महत्वपूर्ण प्रश्नोत्तर, तथा स्व-मूल्यांकन के लिए ऑनलाइन इंटरएक्टिव MCQ टेस्ट।

⚖️ CBSE Class 10 Science Unit-wise Weightage (इकाईवार अंक विभाजन)

Unit / इकाईUnit Title (विषय)Chapters (अध्याय)Marks (अंक)
Unit I Chemical Substances - Nature and Behaviour
रासायनिक पदार्थ - प्रकृति एवं व्यवहार
Ch 1 - 425 Marks
Unit II World of Living
सजीव जगत (जीव विज्ञान)
Ch 5 - 825 Marks
Unit III Natural Phenomena
प्राकृतिक घटनाएँ (प्रकाशिकी)
Ch 9 - 1012 Marks
Unit IV Effects of Current
विद्युत का प्रभाव
Ch 11 - 1213 Marks
Unit V Natural Resources
प्राकृतिक संसाधन (पर्यावरण)
Ch 135 Marks
Total Theory Examination / सैद्धांतिक परीक्षा80 Marks
Internal Assessment (Practicals & Periodic Tests) / आंतरिक मूल्यांकन20 Marks

📚 Complete Chapter Directory (अध्यायवार संपूर्ण अध्ययन सामग्री)

Select any chapter to access Detailed Notes, Revision Sheets, Step-Marked NCERT Solutions, and Interactive MCQs.

Showing 13 of 13 Chapters
CHAPTER 1 Unit I

Chemical Reactions and Equations • रासायनिक अभिक्रियाएँ एवं समीकरण

Types of chemical reactions, combination, decomposition, displacement, double displacement, redox, balancing equations, corrosion, and rancidity.

CHAPTER 2 Unit I

Acids, Bases and Salts • अम्ल, क्षारक एवं लवण

Indicators, pH scale, chemical properties of acids & bases, salts preparation (Baking Soda, Bleaching Powder, Plaster of Paris).

CHAPTER 3 Unit I

Metals and Non-metals • धातु एवं अधातु

Physical and chemical properties, reactivity series, formation of ionic compounds, metallurgy and corrosion prevention.

CHAPTER 4 Unit I

Carbon and its Compounds • कार्बन एवं उसके यौगिक

Covalent bonding, versatile nature of carbon, homologous series, functional groups, chemical properties, soaps and detergents.

CHAPTER 5 Unit II

Life Processes • जैव प्रक्रम

Nutrition (autotrophic & heterotrophic), respiration (aerobic & anaerobic), human transportation system, and excretion.

CHAPTER 6 Unit II

Control and Coordination • नियंत्रण एवं समन्वय

Nervous system, structure of neuron, reflex arc, human brain, plant hormones (tropisms), and endocrine glands.

CHAPTER 7 Unit II

How do Organisms Reproduce? • जीव जनन कैसे करते हैं?

Asexual reproduction modes, sexual reproduction in flowering plants, human male and female reproductive systems, reproductive health.

CHAPTER 8 Unit II

Heredity • आनुवंशिकता

Mendel’s laws of inheritance, monohybrid and dihybrid crosses, sex determination in human beings.

CHAPTER 9 Unit III

Light – Reflection and Refraction • प्रकाश – परावर्तन तथा अपवर्तन

Spherical mirrors, ray diagrams, mirror formula, refractive index, lenses, lens formula, magnification, and power of lens.

CHAPTER 10 Unit III

The Human Eye and the Colourful World • मानव नेत्र तथा रंग-बिरंगा संसार

Structure of human eye, defects of vision (myopia, hypermetropia, presbyopia), dispersion of light, atmospheric refraction, scattering of light (Tyndall effect).

CHAPTER 11 Unit IV

Electricity • विद्युत

Electric current, potential difference, Ohm’s law, factors affecting resistance, series and parallel combinations, Joule’s heating law, electric power.

CHAPTER 12 Unit IV

Magnetic Effects of Electric Current • विद्युत धारा के चुंबकीय प्रभाव

Magnetic field lines, field due to current-carrying conductor, solenoid, Fleming’s Left-Hand Rule, electric motor principle, electromagnetic induction, domestic circuits.

CHAPTER 13 Unit V

Our Environment • हमारा पर्यावरण

Ecosystem, food chains and food webs, 10% energy transfer law, biomagnification, ozone layer depletion, and solid waste management.

🎯 CBSE Class 10 Science Board Exam Strategy (परीक्षा में 95+ स्कोर करने की रणनीति)

To score 95+ in CBSE Class 10 Science, master the conceptual fundamentals and focus heavily on chemical equations, labeled ray diagrams, and standard SI units. The theory examination carries 80 marks distributed across 5 core units: Chemical Substances (25 marks), World of Living (25 marks), Natural Phenomena (12 marks), Effects of Current (13 marks), and Natural Resources (5 marks). Allocate daily time for writing balanced equations, practicing circuit diagrams, and solving previous 5-year question papers with step marking.

CBSE कक्षा 10 विज्ञान बोर्ड परीक्षा में 95+ अंक अर्जित करने के लिए वैचारिक स्पष्टता, संतुलित रासायनिक समीकरणों का निरंतर अभ्यास और स्वच्छ नामांकित चित्रों पर विशेष ध्यान दें। कुल 80 अंकों का सिद्धांतिक प्रश्नपत्र 5 प्रमुख इकाइयों में विभाजित है: रासायनिक पदार्थ (25 अंक), सजीव जगत (25 अंक), प्राकृतिक घटनाएँ (12 अंक), विद्युत का प्रभाव (13 अंक) एवं प्राकृतिक संसाधन (5 अंक)। परीक्षा में स्टेप-मार्किंग का लाभ उठाने के लिए उत्तरों को बिंदुवार लिखें तथा सूत्रों व इकाइयों का सही प्रयोग करें।

❓ Frequently Asked Questions (अक्सर पूछे जाने वाले प्रश्न)

Are these Class 10 Science notes updated for the CBSE 2025-26 Board Exam?
Yes, 100%. All chapter notes, NCERT solutions, and important questions strictly follow the rationalized NCERT syllabus and deleted-syllabus guidelines approved by CBSE for the 2025-26 academic session.
How can I access NCERT Solutions in both Hindi and English mediums?
You can toggle the medium switch buttons [हिंदी माध्यम] or [English Medium] at the top of the chapter list. Each chapter card provides direct links to NCERT Solutions in your selected medium.
Which units carry the highest weightage in Class 10 Science?
Unit I (Chemical Substances - Nature and Behaviour) and Unit II (World of Living) carry the highest weightage, contributing 25 marks each (total 50 out of 80 marks in theory).
Are step-by-step balanced chemical equations provided in the solutions?
Yes. Every chemical equation is balanced with phase symbols (s, l, g, aq) using KaTeX typography, along with reaction conditions and physical observations.
How can I practice for the 20-mark objective and MCQ questions?
Click on the "Practice MCQs" button under each chapter. It opens an interactive timed quiz testing conceptual, assertion-reason, and case-based questions with instant scoring.