NCERT Solutions for Class 8 Science Chapter 6: Combustion and Flame

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NCERT Solutions for Class 8 Science Chapter 6 Combustion and Flame are provided in this article. It includes all the important definitions, concepts, and methodologies that will be really beneficial for the students. The important topics that are included in this chapter are:

What is combustion?
How did we control fire?
Types of combustion
Flame
Structure of a flame
What is fuel?
Fuel efficiency

Download PDF: NCERT Solutions for Class 8 Science Chapter 6 Combustion and Flame

NCERT Solutions for Class 8 Science Chapter 6

Class 8 Science Chapter 6 Combustion and Flame: Important Topics

The fuel LPG in a gas cylinder is exposed to a temperature higher than its ignition temperature, which results in its oxidation with the oxygen in the air and consequently produces heat and light. This oxidation of fuel is called combustion. In other words, combustion is the scientific term for burning. Flames are visible indicators of combustion taking place. When the vapor of the hydrocarbon undergoes combustion, the flame is produced. substances that cannot vaporize will not produce a flame.

Types of Combustion

There are five types of combustion which are as follows:

Rapid combustion – Rapid combustion is when combustion occurs rapidly.
Spontaneous combustion – This is the type of combustion in which material suddenly bursts into flames, without the application of any apparent cause. Eg, Burning of phosphorus.
Complete combustion – The mixture of fuel with oxygen without remaining fuel over time, friction and high enough temperature to ignite all the fuel components is called complete combustion.
Incomplete combustion – Incomplete combustion is basically formed by inadequate air-fuel mixing, insufficient residence time, insufficient temperature and low total excess air.
Explosion – Explosion takes place when a sudden reaction takes place with the release of heat and light and evolution of a large amount of gas takes place. Eg, firecrackers.

What is Fuel?

A fuel is any material that is made to react with other substances so that it releases energy as thermal energy or to be used for work. For instance, wood, coal, LPG, kerosene, petrol, diesel, natural gas, biogas.

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