Chapter 6 : Combustion and Flame - Ncert Solutions for Class 8 Science CBSE
In earlier times, Science mostly referred to inventions or was about astronomy and medicine. Modern Science is divided into three parts: Physics, Chemistry and Biology. TopperLearning provides study materials for CBSE Class 8 Science which will help you to score more marks in your examination. With our learning packages, students can find various study materials such as
Videos lessons: Our engaging and highly interactive video lessons focus on concepts with real-life examples. Our video lessons are perfect for quality learning and are synchronous with our online learning sessions.
Revision Notes: Our revision notes act as an instrumental tool for CBSE Class 8 students who want to clear their Science examination with more marks. These effective study notes also help when doing homework.
Question Banks: You can find 3500+ important questions according to the latest CBSE syllabus to assist you when preparing for the examination. These important questions are mostly asked in the question paper.
Sample Papers: The sample papers help you understand the types of questions which can be asked in the examination.
All our study materials for CBSE Class 8 Science are prepared by our academic experts who have a vast knowledge of the academic industry. Additionally, you get NCERT textbook solutions free of cost. Our study materials will help you to score more marks in the examination and easily clear your Science fundamentals.
Chapter 6 - Combustion and Flame Excercise 75
(i) Presence of a fuel
(ii) Air (or oxygen)
(iii) Ignition temperature (minimum temperature at which a substance catches fire)
Concept insight: below ignition temperature combustion cannot takes place
(c) ignition temperature
(b) LPG is a better domestic fuel because being a gaseous fuel it does not produce smoke and un-burnt carbon particles, which cause respiratory problems.
(c) A piece of paper wrapped around aluminium pipe does not catch fire easily. This is because aluminium, being a metal, is a good conductor of heat. Therefore, heat is transferred from the paper to the metal and the paper does not attain its ignition temperature.
(i) Since it is heavier than oxygen, it covers the fire like a blanket and cuts off the contact between oxygen and fuel.
(ii) In cylinders, CO2 is kept in the liquid form. When released, it expands enormously and cools down. This brings down the temperature of the fuel, which helps in controlling the fire.
Key Features of CBSE Class 8 Science:
- Prepared by subject matter experts
- According to the latest CBSE syllabus
- Helpful when doing homework
- Easy to understand
- Helpful for quick revision
- Score more marks in the examination
- Free textbook solutions & doubt-solving sessions
- Increase paper-solving speed
- Improvement in marks
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Verify mobile number
Enter the OTP sent to your number