NCERT Solutions Class 8 Science - Chapter 3 Coal and Petroleum - PDF Download

NCERT class 8 solutions for Coal and Petroleum are prepared for Class 8 students, who want to perform better in their exam. These NCERT solutions cover the entire CBSE syllabus and provide answers to the Class 8 Science questions. NCERT solutions will guide you in the exam preparation and help you in understanding the topic thoroughly. Class 8 is a crucial stage in a student's life. In class 8, students learn many new topics which form the foundation for the topics covered in higher classes. 

In class 8, students need to solve the NCERT class 8 science questions at the end of the syllabus. NCERT class 8 solutions for coal, petroleum and natural Gas Chapter 3 provide answers to questions on the formation of coal, types of fossil fuel, uses of fossil fuel and limitations of the use of fossil fuel. These class 8 solutions for chapter 3 coal and petroleum are prepared systematically by the experienced teachers and will help you not only in the exam preparation but also in understanding the subject thoroughly.

NCERT Solutions for Class 8 Science Chapter 3 Topics

3.1 Coal: Coal is a fuel used to cook food. It used to be used in railway engines to generate steam to power the engine. It can also be used in a thermal power plant to generate electricity. There are many industries that use coal as a fuel.

Following point will be discussed in the section 3.1 Coal: 

• Story of Coal

• Coke

• Coal Tar

• Coal Gas

3.2 Petroleum: Petrol is used as a motor fuel in light vehicles like motor cycles/scooters and cars, while diesel is used in heavy motor vehicles like trucks and tractors. Petrol and diesel are derived from a natural resource known as petroleum. Petroleum was created by the decomposition of marine organisms. As they died, their bodies were deposited at the bottom of the sea, where they were covered by layers of sediment and clay. Over millions of years, the lack of air, high temperature and high pressure caused the decomposition of these dead organisms into petroleum and natural gas. Refining of petroleum will also be discussed in the section 3.2.

3.3 Natural Gas: Natural gas is one of the most important fossil fuels because it is easily transported through pipelines. The natural gas is stored under high pressure and is known as compressed natural gas or CNG. CNG is mainly used for power generation. CNG is also being used for transport vehicles as it is a less polluting fuel. One of the best things about CNG is the fact that it can be directly used for burning in homes and factories where the gas can be supplied through pipelines. There is a network of pipelines in places like Vadodara, Gujarat, some areas of Delhi and many other places.

3.4 Some Natural Resources are Limited: It is well known that coal and petroleum are fossil fuels. It took millions of years for these to be converted into these fuels. However, the available reserves of these fuels will only last for a few hundred years. Furthermore, the combustion of these fuels is a major source of air pollution. Furthermore, their use is associated with global warming. Therefore, it is essential that we only use these fuels when absolutely necessary. This will lead to improved environmental conditions, reduced risk of global warming, and their availability for a longer period.

Key Features of Class 8 Science Chapter 3

Chapter 5 of the Class 8 Science Chapter 5 delves into the science of fossil fuels, specifically coal and petroleum. This chapter provides an overview of the various forms of fossil fuels, including coal, petroleum, and reserves. 

• It also explains the formation of coal from the remains of ancient plants, the various types of coal, and the formation of petroleum from marine organisms and plants. 

• Additionally, it examines the distribution of coal and oil reserves around the world, as well as the exploration of countries with substantial coal and oil reserves.

• Exploring the refining process for crude oil to produce a variety of useful products, such as gasoline, diesel, kerosene, and other petroleum-based products. 

• Exploring the range of products derived from petroleum, such as plastics, synthetic fibres, lubricants and chemicals. 

• Exploring how coal can be used to generate electricity and fuel industrial processes and how fossil fuels can be conserved and reduced in their environmental impact. 

• Exploring energy efficiency practices and reducing dependency on fossil fuels and alternative energy sources like solar, wind and hydroelectric energy as more sustainable alternatives.

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Frequently Asked Questions

Question 1: What are fossil fuels?

Answer 1: A fossil fuel is a natural resource made from the fossilized remains of living things. Coal, oil, and gas are examples of fossil fuels.

Question 2: How is coal formed?

Answer 2: Coal is made up of what's left of plants that lived a million years ago. As time went on, the plants got buried under sediment, and over time, heat and pressure turned them into coal.