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NCERT Solutions for Class 8 Science - Chapter 4 Combustion and Flame - PDF Download

JEE Mains & Advanced

NCERT solutions for class 8 science chapter 4 Combustion and Flame is essential for students, who want to perform better in their exam. NCERT solutions for class 8 science combustion and flame provide an interactive way of preparing the topics. NCERT science class 8 chapter 4 solutions pdf is prepared by science experts of eSaral in accordance with the most recent CBSE guidelines. NCERT solutions are a crucial tool for students when it comes to exam preparation and homework. For those studying in class 8, NCERT solutions for class 8 science chapter 4 combustion and flame are recommended to help them understand the basics. 

Students pursuing science may find combustion and flame to be an essential part of their studies, and the NCERT solutions for class 8 science chapter 4 can help understudies to organize the subjects in a more intuitive manner. For those focusing in class 8 science chapter 4 NCERT solutions pdf download is recommended to review the course readings and comprehend the questions posed for a better understanding of the topics and subtopics. The arrangements provided can be used to quickly resolve any queries. The NCERT solutions for class 8 science chapter 4 combustion and flame provides answers to questions related to burning, types of burns, the role of oxygen in combustion, inflammable materials, fire control, and the definition and zones of fire. Additionally, NCERT science class 8 ch 4 combustion and flame solutions pdf provides information on hazardous contaminants, corrosive rain, and related items.

NCERT Solutions for Class 8 Science Chapter 4 Topics

Section Name

Topic Name


Combustion and Flame


What is Combustion?


How Do We Control Fire?


Types of Combustion




Structure of a Flame


What is a Fuel?


Fuel Efficiency

4.1 What is Combustion?: A combustion is a chemical reaction in which a substance interacts with oxygen to produce heat. A substance that undergoes a combustion reaction is called a combustible. A combustible substance is also called a fuel. A fuel can be a solid, a liquid or a gas. In some cases, light is emitted during a combustion reaction, either as flame or as a glow.

4.2 How Do We Control Fire?: Fire control is the process of controlling the spread and intensity of a fire to reduce the amount of damage, injuries and fatalities caused by a fire. This can be accomplished through a combination of prevention, early detection and firefighting techniques.

4.3 Types of Combustion: Different types of combustion may be distinguished depending on the circumstances in which combustion takes place, the type of fuel used, and the combustion products produced. In this section, rapid combustion, spontaneous combustion and explosion will be discussed.

4.4 Flame: Flames are a luminous gas produced during the combustion process. They are composed of hot gases and particles, as well as excited molecules that emit light as they interact with each other. Flames are commonly associated with the burning of gases and volatiles.

4.5 Structure of a Flame: A flame’s structure is made up of zones or regions. Each zone has its own properties and uses. Flames have a complicated structure because of the chemical reactions and physical operations that take place in them.

4.6 What is a Fuel?: Fuel is any substance that can be burned or chemically reacted with an oxidising agent, usually oxygen, to produce energy, such as heat, light or other products. Most commonly, fuels are used to supply energy for a variety of purposes, including heating and cooling, power generation, transportation and industrial processes.

4.7 Fuel Efficiency: Fuel efficiency refers to a system or device’s ability to turn a given quantity of energy into a useful resource with minimal waste. Fuel efficiency is a key concept in many industries, particularly in the transportation and energy generation sectors, where optimizing energy consumption can result in cost savings and lower environmental impact.

Key Features of Class 8 Science Chapter 4

  • The substances that are burned in the air are referred to as combustibles. Oxygen is necessary for combustion, and heat and light are emitted during the process. 

  • The ignition temperature is the lowest point at which a combustible material catches fire. Inflammable materials have very low ignition temperatures. 

  • Fire can be extinguished by eliminating one or more of the necessary components for the production of fire. 

  • Water is typically used to control fires, but it is not suitable for controlling fires involving electrical equipment or oils. 

  • There are a variety of types of combustions, such as rapid combustion, spontaneous combustion, and explosion.

  • There are three zones of a flame: the dark zone, the luminous zone and the non-luminous zone. The ideal fuel is inexpensive, easily accessible, easily combustible and easily transportable. It has a high calorific value and does not produce any gases or residues that cause pollution. 

  • Fuels vary in efficiency and cost. The efficiency of a fuel is measured in terms of its calorific value, which is expressed in kilojoules per kilogram. 

  • The combustion of a fuel produces unburned carbon particles in the air, which are dangerous pollutants causing respiratory problems. 

  • The incomplete combustion of a fuel creates poisonous carbon monoxide gas, which has been linked to an increase in carbon dioxide in the atmosphere. 

  • The combustion of coal, diesel, and petrol causes acid rain, which is harmful to crops, buildings and soil.

Benefits of Downloading the PDF of NCERT Solutions Class 8 Science Chapter 4 Combustion and Flame

Downloading the NCERT science class 8 ch 4 combustion and flame solutions pdf, can provide several advantages to students. Some of the main advantages of combustion and flame class 8 science chapter 4 NCERT solution are:

Access to comprehensive solutions: The NCERT science class 8 chapter 4 solutions pdf provides comprehensive and well-organized solutions to the questions in the textbook. This helps in clear understanding of the concepts and helps students to solve problems efficiently.

Clarity of concepts: The  NCERT science class 8 chapter 4 solutions pdf often include step by step explanation and justification for each question in the chapter. This can help students to clarify any doubts or misunderstandings they may have about the concepts in the chapter.

Aligned with the curriculum: NCERT Solutions are aligned with the curriculum, which makes them highly relevant for exam preparation. Students can improve their exam preparation by using the class 8 science chapter 4 ncert solutions pdf download to practice with accurate solutions. With the class 8 science chapter 4 ncert solutions pdf download available, you can learn at your own pace. You can review the solutions as often as needed to strengthen your understanding of the chapter.

Availability: Students can access the NCERT science class 8 ch 4 combustion and flame solutions pdf free offline once it has been downloaded, allowing them to study even when they are not connected to the internet. This is especially beneficial in regions with limited internet access. 

Supplementary Resource: Additionally, the NCERT science class 8 ch 4 combustion and flame solutions pdf of the solutions can be used as a supplementary resource to the textbook, providing additional explanations and perspectives that may not be available in the textbook. 

Self Study: Furthermore, students who are studying independently can take advantage of the detailed solutions in the NCERT science class 8 ch 4 combustion and flame solutions pdf, acting as a virtual mentor to guide them through the content of the chapter.

Frequently Asked Questions

Question 1: What is Combustion?

Answer 1: The process of combustion is characterized by the rapid reaction of a material with oxygen, resulting in the production of heat, light and, in many cases, flame. This process is known as oxidation.

Question 2: What is the ignition temperature?

Answer 2: The ignition temperature of a fuel is the temperature at which it begins to burn when it is exposed to an ignition source such as a flame or heat.



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