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Lakhmir Singh Solutions for Class 8 Science
By Maitree Choube
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Updated on 11 Jun 2025, 16:03 IST
Lakhmir Singh Solutions for Class 8 Science are among the most trusted study materials for CBSE students preparing for exams. Designed by Lakhmir Singh and Manjit Kaur, these solutions provide a clear and in-depth explanation of every concept, making Science easier to understand. The step-by-step solutions help students develop a strong foundation in Physics, Chemistry, and Biology while enhancing their problem-solving skills.
These solutions are expertly crafted to match the CBSE syllabus, ensuring students get accurate and exam-oriented answers. To boost preparation, students are encouraged to read NCERT textbook theory alongside these solutions and practice NCERT questions for a complete conceptual grasp. Additionally, students looking to test their understanding can take online mock tests for Class 8 Science, which provide instant feedback and performance analysis.
For comprehensive learning and effective exam preparation, Lakhmir Singh Class 8 Solutions serve as a valuable resource, helping students score better and gain confidence in the subject.
Lakhmir Singh Solutions for Class 8 Science
Lakhmir Singh Solutions for Class 8 Science is a comprehensive study guide that helps students master fundamental science concepts effectively. These solutions provide detailed explanations for every topic, ensuring students build a strong conceptual foundation while preparing for their exams.
Covering Physics, Chemistry, and Biology, the book is structured chapter-wise with a variety of question types, including very short answer questions, short answer questions, long answer questions, multiple-choice questions (MCQs), and Higher Order Thinking Skills (HOTS) questions.
| Chapter Number | Chapter Name |
| 1 | Crop Production and Management |
| 2 | Micro-Organisms: Friends and Foe |
| 3 | Synthetic Fibers and Plastics |
| 4 | Materials: Metals and Non-metals |
| 5 | Coal and Petroleum |
| 6 | Combustion and Flame |
| 7 | Conservation of Plants and Animals |
| 8 | Cell Structure and Functions |
| 9 | Reproduction in Animals |
| 10 | Reaching the Age of Adolescence |
| 11 | Force and Pressure |
| 12 | Friction |
| 13 | Sound |
| 14 | Chemical Effects of Electric Current |
| 15 | Some Natural Phenomena |
| 16 | Light |
| 17 | Stars and the Solar System |
| 18 | Pollution of Air and Water |
Lakhmir Singh Class 8 Science Solutions: Chapter-wise Breakdown
Lakhmir Singh’s Class 8 Science book is a trusted resource among students. Below is a chapter-wise summary of concepts covered and the number of questions by type. These solutions offer step-by-step answers to all types of questions—short answers, long answers, and numericals—making it easier to follow and learn.
Available in PDF format, these solutions are perfect for online study and quick revision anytime, anywhere. Whether you’re preparing for exams or just want extra practice, Lakhmir Singh Science Class 8 Solutions help improve your answer-writing skills and boost your confidence. With clear explanations and concept-based learning, science becomes both easier and more enjoyable.
Below is a chapter-wise detailed breakdown of the Lakhmir Singh Solutions for Class 8 Science along with the number of questions included in each chapter:
Chapter 1: Crop Production and Management
This chapter introduces students to the importance of crops and various methods of crop production, soil preparation, irrigation, and harvesting. It also explains the significance of organic farming and modern agricultural techniques.
The table below provides a breakdown of the total number of questions included in Chapter 1:
| Chapter Number | 1 |
| Very short answer type questions | 30 |
| Short answer type questions | 35 |
| Long answer type questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 95 |
Chapter 2: Microorganisms – Friend and Foe
Students learn about microorganisms, their types, their role in the environment, and their effects on human life. The chapter covers useful microbes, harmful microbes, food preservation methods, and the nitrogen cycle.
The table below provides a breakdown of the total number of questions included in Chapter 2:
| Chapter Number | 2 |
| Very short answer type questions | 40 |
| Short answer type questions | 25 |
| Long answer type questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 95 |
Chapter 3: Synthetic Fibres and Plastics
This chapter explains natural and synthetic fibres, their properties, and their uses. It also discusses the advantages and disadvantages of plastics and how to reduce plastic pollution.
The table below provides a breakdown of the total number of questions included in Chapter 3:
| Chapter Number | 3 |
| Very short answer type questions | 15 |
| Short answer type questions | 35 |
| Long answer type questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 80 |
Chapter 4: Materials – Metals and Non-Metals
This chapter covers the physical and chemical properties of metals and non-metals, their applications, and the differences between them.
The table below provides a breakdown of the total number of questions included in Chapter 4:
| Chapter Number | 4 |
| Very short answer type questions | 35 |
| Short answer type questions | 30 |
| Long answer type questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 95 |
Chapter 5: Coal and Petroleum
Students learn about fossil fuels, their formation, extraction, uses, and alternatives to reduce dependency on non-renewable resources.
The table below provides a breakdown of the total number of questions included in Chapter 5:
| Chapter Number | 5 |
| Very short answer type questions | 23 |
| Short answer type questions | 18 |
| Long answer type questions | 4 |
| Multiple-choice questions | 12 |
| Higher-order thinking skills questions | 3 |
| Total questions | 60 |
Chapter 6: Combustion and Flame
This chapter explores the process of combustion, types of flames, and the chemical reactions involved in burning. The table below provides a breakdown of the total number of questions included in Chapter 6:
| Chapter Number | 6 |
| Very short answer type questions | 20 |
| Short answer type questions | 30 |
| Long answer type questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 80 |
Chapter 7: Conservation of Plants and Animals
Understanding the importance of biodiversity, deforestation, and conservation measures is covered in this chapter. The table below provides a breakdown of the total number of questions included in Chapter 7:
| Chapter Number | 7 |
| Very short answer type questions | 18 |
| Short answer type questions | 42 |
| Long answer type questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 90 |
Chapter 8: Cell Structure and Functions
Students learn about the basic unit of life – the cell, its structure, and functions in plants and animals. The table below provides a breakdown of the total number of questions included in Chapter 8:
| Chapter Number | 8 |
| Very short answer type questions | 45 |
| Short answer type questions | 20 |
| Long answer type questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 95 |
Chapter 9: Reproduction in Animals
This chapter explains the importance of reproduction, different modes of reproduction, and the reproductive system in animals.The table below provides a breakdown of the total number of questions included in Chapter 9:
| Chapter Number | 9 |
| Very short answer type questions | 35 |
| Short answer type questions | 25 |
| Long answer type questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 90 |
Chapter 10: Reaching the Age of Adolescence
Students learn about puberty, hormonal changes, and the effects of adolescence on the human body. The table below provides a breakdown of the total number of questions included in Chapter 10:
| Chapter Number | 10 |
| Very short answer type questions | 50 |
| Short answer type questions | 40 |
| Long answer type questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills questions | 5 |
| Total questions | 120 |
Chapter 11: Force and Pressure
The world around us is filled with forces acting in different ways. Force is what makes objects move, stop, or change direction. Pressure, on the other hand, is the force applied to a surface per unit area. This chapter explores how force and pressure work in solids, liquids, and gases and their real-life applications.
The table below provides a breakdown of the total number of questions included in Chapter 11:
| Chapter Number | 11 |
| Very short answer questions | 30 |
| Short answer questions | 30 |
| Long answer questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills (HOTS) questions | 5 |
| Total Questions | 90 |
Chapter 12: Friction
Friction is the invisible force that prevents us from slipping when we walk. It resists the movement of objects in contact. This chapter explains different types of friction, its advantages, disadvantages, and how it can be increased or reduced based on the situation.
The table below provides a breakdown of the total number of questions included in Chapter 12:
| Chapter Number | 12 |
| Very short answer questions | 35 |
| Short answer questions | 30 |
| Long answer questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills (HOTS) questions | 5 |
| Total Questions | 95 |
Chapter 13: Sound
Sound is an essential part of our lives. It is a form of energy that travels in waves and helps us communicate. This chapter covers how sound is produced, how it travels, and its properties, such as pitch, volume, and frequency. The table below provides a breakdown of the total number of questions included in Chapter 13:
| Chapter Number | 13 |
| Very short answer questions | 50 |
| Short answer questions | 25 |
| Long answer questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills (HOTS) questions | 5 |
| Total Questions | 105 |
Chapter 14: Chemical Effects of Electric Current
Electricity has interesting effects when passed through different substances. This chapter explains how electric current causes chemical reactions, why some liquids conduct electricity while others don’t, and how electroplating works. The table below provides a breakdown of the total number of questions included in Chapter 14:
| Chapter Number | 14 |
| Very short answer questions | 25 |
| Short answer questions | 15 |
| Long answer questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills (HOTS) questions | 5 |
| Total Questions | 70 |
Chapter 15: Some Natural Phenomena
Nature is full of powerful events that can sometimes be destructive. This chapter focuses on natural phenomena like lightning and earthquakes, explaining their causes, effects, and safety measures to protect ourselves from them. The table below provides a breakdown of the total number of questions included in Chapter 15:
| Chapter Number | 15 |
| Very short answer questions | 25 |
| Short answer questions | 20 |
| Long answer questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills (HOTS) questions | 5 |
| Total Questions | 75 |
Chapter 16: Light
Light helps us see the world around us. This chapter explains the properties of light, how it reflects and refracts, and how different mirrors and lenses affect light. It also covers the working of the human eye. The table below provides a breakdown of the total number of questions included in Chapter 16:
| Chapter Number | 16 |
| Very short answer questions | 40 |
| Short answer questions | 35 |
| Long answer questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills (HOTS) questions | 5 |
| Total Questions | 105 |
Chapter 17: Stars and the Solar System
The vast universe is filled with stars, planets, and celestial bodies. This chapter explores our solar system, the different planets, the Moon, and other fascinating cosmic objects. The table below provides a breakdown of the total number of questions included in Chapter 17:
| Chapter Number | 17 |
| Very short answer questions | 45 |
| Short answer questions | 30 |
| Long answer questions | 5 |
| Multiple-choice questions | 20 |
| Higher-order thinking skills (HOTS) questions | 5 |
| Total Questions | 105 |
Chapter 18: Pollution of Air and Water
Pollution is one of the biggest environmental concerns today. This chapter explains how air and water pollution occur, their effects on health and nature, and ways to control and reduce pollution for a healthier planet. The table below provides a breakdown of the total number of questions included in Chapter 18:
| Chapter Number | 18 |
| Very short answer questions | 10 |
| Short answer questions | 15 |
| Long answer questions | 5 |
| Multiple-choice questions | 15 |
| Higher-order thinking skills (HOTS) questions | 5 |
| Total Questions | 50 |
Why Choose Lakhmir Singh Solutions for Class 8 Science?
- Concept-Based Learning – Every topic is explained in a clear and structured manner, making it easy to understand.
- Chapter-Wise Solutions – Answers are provided for every chapter, covering all possible question types.
- CBSE-Aligned Content – Solutions strictly follow the CBSE syllabus, ensuring exam relevance.
- Easy-to-Understand Language – Solutions are written in simple language, making them accessible to all students.
- Additional HOTS Questions – Higher Order Thinking Skills (HOTS) questions help in enhancing critical thinking abilities.
- Exam-Oriented Approach – Helps students prepare effectively with NCERT textbook solutions and practice questions.
Lakhmir Singh Solutions for Class 8 Science is the perfect guide for students aiming to excel in exams and build a strong science foundation.
Lakhmir Singh Solutions for Class 8 Science FAQs
Can I read Lakhmir Singh Solutions for Class 8 Science?
Yes, you can read Lakhmir Singh Solutions for Class 8 Science, as they are highly recommended for students who want a conceptual understanding of science topics. These solutions provide detailed explanations, step-by-step answers, and practical examples to help students grasp concepts easily. Whether you're preparing for school exams or competitive tests, these solutions are student-friendly and exam-oriented.
Why choose Infinity Learn for Class 8 Science?
Infinity Learn is a trusted platform that offers comprehensive and well-structured solutions for Class 8 Science based on Lakhmir Singh's book. Here’s why Infinity Learn is a great choice:
- Accurate and detailed explanations that simplify complex concepts.
- Step-by-step solutions to help students understand problem-solving techniques.
- Exam-focused answers that align with CBSE guidelines.
- Interactive learning resources to enhance understanding.
- Accessible anytime, anywhere, making learning convenient.
Choosing Infinity Learn Lakhmir Singh Solutions ensures concept clarity, exam readiness, and a deeper understanding of science topics.
How are Infinity Learn Lakhmir Singh Solutions for Class 8 crucial for students?
The Infinity Learn Class 8 Science Lakhmir Singh Solutions play a crucial role in helping students by:
- Strengthening the fundamentals of Physics, Chemistry, and Biology.
- Providing clear, logical explanations with real-life applications.
- Offering chapter-wise and topic-wise solutions for systematic learning.
- Helping students improve problem-solving skills and score higher marks.
- Serving as a reliable reference guide for doubt-solving and exam preparation.
By using Infinity Learn's well-explained solutions, students gain better conceptual clarity, confidence, and academic success.
What are the topics covered in Class 8 Science Lakhmir Singh Solutions?
The Class 8 Science Lakhmir Singh Solutions cover topics from Physics, Chemistry, and Biology, as per the CBSE syllabus. Here’s a chapter-wise breakdown:
- Force and Pressure
- Friction
- Sound
- Light
- Chemical Effects of Electric Current
- Some Natural Phenomena
- Stars and the Solar System
Synthetic Fibres and Plastics - Materials: Metals and Non-Metals
- Coal and Petroleum
- Combustion and Flame
- Chemical Effects of Electric Current
- Crop Production and Management
- Microorganisms: Friend and Foe
- Conservation of Plants and Animals
- Cell Structure and Functions
- Reproduction in Animals
- Reaching the Age of Adolescence
- Pollution of Air and Water
These topics help students build a strong foundation in science and develop critical thinking skills.
Why use Lakhmir Singh Solutions for Class 8 Science?
Lakhmir Singh Solutions for Class 8 Science are one of the best study materials for CBSE students. Here’s why they are essential:
- Simplified language: Concepts are explained in an easy-to-understand manner.
- Comprehensive coverage: All topics are explained in detail, covering NCERT and CBSE syllabi.
- Step-by-step problem-solving: Helps students understand scientific principles effectively.
- Practical applications: Solutions include real-world examples to make learning engaging.
- Exam-focused approach: Helps students prepare better for exams with well-structured answers.