Table of Contents
For young brains, learning about fossil fuels, how they are extracted, and how they are being replaced by more environmentally friendly energy is critical. This is why the CBSE has included a chapter on coal and petroleum in the Class 8 Science book. It is the fifth chapter that discusses the depletion of non-renewable resources that we use on a daily basis. Science Chapter 5 in Class 8 is an important portion of the curriculum. Refer to the NCERT solutions for Class 8 Science Chapter 5 by INFINITY LEARN to follow the exercise questions and learn how to solve them.
Download the NCERT Solutions Class 8 Science Chapter 5 answer in PDF format for free and use it offline to swiftly prepare for the chapter. You may rest confident that the answers in this solution are of the greatest quality and will be formatted according to CBSE guidelines. Learn about fossil fuels and other inexhaustible energy sources in this chapter, then use the NCERT solutions for Class 8 Science Chapter 5 to prepare your answers. INFINITY LEARN is a website that offers students free NCERT Solutions (CBSE) and other study materials. Maths Students who are looking for better solutions can download NCERT Solutions for Class 8 Maths to help them revise the entire CBSE syllabus for Class 8 and get better grades in their exams.
NCERT Solutions for Class 8 Science Chapter 5 – Coal and Petroleum
Ques 1. What are the advantages of using CNG and LPG as fuels?
Ans: The advantages of using compressed natural gas (CNG) and liquified petroleum gas (LPG) as fuels include their ability to provide a lot of heat energy when burnt, their cleanliness as they do not emit smoke, their affordability due to low prices, their ease of availability, and their ease of transportation through cylinders or pipelines.
Ques 2. Name the petroleum product used for surfacing of roads.
Ans: Bitumen is the petroleum product used for surfacing roads.
Ques 3. Describe how coal is formed from dead vegetation. What is this process called?
Ans: Coal is formed from the remains of dead plants and animals that are buried in the ground and exposed to high temperatures and pressure in the absence of air, a process known as carbonization.
Ques 4. Fill in the banks.
a) Fossil fuels are ____ , ____ and _____.
Ans: Fossil fuels are coal, petroleum, and natural gas.
b) Process of separation of different constituents from petroleum is called ____.
Ans: The process of separation of different constituents from petroleum is called refining.
c) Least polluting fuel for vehicles is _____.
Ans: The least polluting fuel for vehicles is compressed natural gas (CNG).
Ques 5. Tick True/False against the following statements.
a) Fossil fuels can be made in the laboratory.
Ans: False. Fossil fuels are made from the remains of dead plants and animals buried inside the earth millions of years ago and exposed to high temperature and pressure conditions.
b) CNG is more polluting fuel than petrol.
Ans: False. CNG is an eco-friendly fuel and safe to use as it does not cause any health issues. Therefore, it is very less polluting.
c) Coke is almost pure form of carbon.
Ans: True. Coke is a fuel with few impurities and high carbon content. That is why it is an almost pure form of carbon.
d) Coal tar is a mixture of various substances.
Ans: True. Coal tar is a mixture of various substances such as dyes, paints, explosives, drugs, etc.
e) Kerosene is not a fossil fuel.
Ans: False. Kerosene is one of the products of the distillation of petroleum products.
Ques 6. Explain why fossil fuels are exhaustible natural resources.
Ans: Mineral oil is made from the dead remains of plants and animals that were buried in the ground millions of years ago under high temperatures and pressure, which cannot be synthesized in the laboratory. Therefore, fossil fuels are a completely natural resource.
Ques 7. Describe characteristics and uses of coke.
Ans: Coke is a substance produced by the destructive distillation of coal. It is a grey, hard, and porous fuel with high carbon content and few impurities. It is used to make steel and metal extraction as a reducing agent.
Ques 8. Explain the process of formation of petroleum.
Ans: Petroleum is made up of dead plant and animal fossils buried in the ground millions of years ago under high temperatures and pressure in the absence of air. The dead remains are broken into smaller units to form petroleum and natural gas.
Ques 9. The following Table shows the total power shortage in India from 1991−1997. Show the data in the form of a graph. Plot shortage percentage for the years on the Y-axis and the year on the X-axis.
| S.No. | Year | Shortage (%) |
| 1 | 1991 | 7.9 |
| 2 | 1992 | 7.8 |
| 3 | 1993 | 8.3 |
| 4 | 1994 | 7.4 |
| 5 | 1995 | 7.1 |
| 6 | 1996 | 9.2 |
| 7 | 1997 | 11.5 |
Ans. Plot the graph using the data provided, with the shortage percentage on the Y-axis and the year on the X-axis. For instance, for the year 1991, mark the point 7.9 on the Y-axis. By plotting the remaining points in a similar manner, the graph will illustrate the trend over time.
NCERT Class 8 Science Chapter Wise Marks Weightage
The Coal and Petroleum Chapter will carry a significant amount of weight in the examination and is an important chapter in terms of exam preparation. The question of fossil fuels receives the most attention in this discussion. The content presented here will assist you in obtaining higher grades and will enable you to fully comprehend the notion. There’s a good chance you’ll get five-point questions. This topic’s three-point and two-point questions are equally essential. The two-mark questions are crucial, and a few frequently requested questions are provided here to help you understand the types of questions that will be asked in the exam.
Why Should You Use NCERT Solutions for Coal and Petroleum in Class 8 Science?
The following are the main reasons for choosing NCERT Solutions for Class 8 Science Coal and Petroleum.
Chapter 5 Class 8 Science Appropriate Answers
Finding the answers to the exercise questions from the Class 8 Science Ch 5 solution becomes a lot easier. Following the exercise, the solution was formatted. As a result, children in Class 8 will quickly learn the answers to a specific question. All of these responses are correct and can be utilized to improve exam scores.
Answers with Simplified Explanations
Students may require an explanation of the solutions to the exercise’s questions. It can be accomplished by using the NCERT Solutions for Chapter 5 Science Class 8 as a guide. All of the problems are discussed in detail, and the answers are simplified so that students can come up with their own answers.
Proper Chapter 5 Science Class 8 Preparation
If you have an exam coming up, you can utilize the NCERT solution for Class 8 Science Chapter 5 to quickly review the material. To prepare, you can also locate the quickest approach to answer the exercise questions.
Using the CBSE Format
You will understand the CBSE format for answering problems and scoring higher in the exams if you use the NCERT solutions for Class 8 Science Ch 5.
NCERT answers for Class 8 Science Chapter 5 are available for free download and may be used to prepare for the chapter while offline. There’s no need to wait the NCERT Solutions for Class 8 Science Chapter 5 Coal and Petroleum can help you clear your problems.
NCERT Class 8 Science Chapter 5 Coal and Petroleum Summary
The discovery of natural fuels is the cornerstone of human progress. Coal and petroleum have long been the primary energy sources for our houses and machines. Without them, we would have had to abandon everything we have today and return to the Middle Ages. The discovery of fossil fuels has pushed the evolution of human civilization towards a better future, according to NCERT Class 8 Chapter 5 Science. These resources are rapidly depleting, according to Class 8 Science Chapter 5 Coal and Petroleum. Scientists have begun developing new technologies to harvest endless energy from natural sources.
You will also discover how fossil fuels are generated in this Class 8th Science Chapter 5. Learn how coal and petroleum are formed over millions of years and under the appropriate conditions. You’ll also discover how destructive distillation and fractional distillation produce the products we use in this chapter. In natural settings, coal and petroleum cannot be used. To make usable fuels and products, they are chemically and physically processed. Study NCERT Class 8 Science Chapter 5 thoroughly and grasp the new ideas so that you can correctly answer the exercises’ questions.
INFINITY LEARN teachers have provided NCERT Solutions for Class 8 Science Chapter 5 to assist you in this part. You can use the answers written by teachers who have taught Class 8 Science before. These educators are aware of the issues that students confront on a regular basis.
Class 8 science chapter 5 Coal and Petroleum FAQs
What is the Best Way to Prepare CBSE Class 8 Science Chapter 5 Coal and Petroleum?
The best way to prepare CBSE Class 8 Science Chapter 5 Coal and Petroleum is by solving the NCERT questions provided at the end of each chapter. These questions help in understanding the chapter in an effective way and are sometimes directly asked in school examinations.
Why are Coal and Petroleum Important for us?
Coal and petroleum are important for us because they are used as sources of energy and are used in various industries. They are also used in transportation and for domestic purposes.
Why Should You Prefer Infinity Learn for NCERT Solution Class 8 Science Chapter 5?
Infinity Learn is a reliable source for NCERT Solutions Class 8 Science Chapter 5 because they are prepared systematically by experienced teachers and are designed to help students understand the topic in-depth.
What are Petroleum and Coal?
Petroleum is a fossil fuel that is refined to produce various products such as petrol, diesel, and lubricants. Coal is a fossil fuel that is used as a source of energy and is also used in the production of steel and other industrial processes.
What are the advantages of using CNG and LPG as fuels?
The advantages of using CNG and LPG as fuels include that they burn easily, give a lot of heat energy when burnt, can be transported easily through pipelines, and are clean fuels that do not release smoke when burnt.
What are Fossil Fuels according to the NCERT Solutions?
Fossil fuels, such as coal, petroleum, and natural gas, are formed from the remains of dead plants and animals that were buried deep inside the earth. They require millions of years to form and cannot be created in the laboratory.
Write the summary of NCERT Class 8 Science Chapter 5.
The NCERT Class 8 Science Chapter 5 Coal and Petroleum covers the formation of fossil fuels, types of fossil fuels, uses of fossil fuels, and limitations of using fossil fuels. It also discusses the importance of coal and petroleum and the need to use them economically to reduce the risk of global warming.
