Last Updated on February 21, 2025 by sanjjeett
The NCERT Solutions have been updated for 2024-2025 sessions, with the new NCERT Books. All questions are solved with detailed explanation of each and every questions. In this article, we are providing NCERT Solutions for Class 8 Science Chapter 3 Coal and Petroleum. It is a part of NCERT Solutions for Class 8 Science series.
| Chapter | Coal and Petroleum |
| Textbook | NCERT |
| Type of Material | NCERT Solutions |
| Format | Question-Answer Format |
| Class | 8 |
| Subject | Science |
| Useful for | Class 8 Studying Students |
| Session | 2024-25 |
| No. of Intext Questions | 9 |
| Exercise Questions | 7 |
| Solutions provided | Yes |
| Important Link | NCERT Solutions for Class 8 Science |
Coal and Petroleum NCERT Solutions Class 8
NCERT Solutions for Class 8 Science Chapter 3, Coal and Petroleum, offer clear, step-by-step answers to all textbook questions. Expertly crafted, these solutions simplify complex concepts, enhance understanding, and build confidence, helping students excel in their studies.
Intext Questions
Page-32
Q. 1. Boojho: Can we use all our natural resources forever?
Ans. No, some natural resources are in unlimited quantity in nature but some resources in nature are limited such as forests, wildlife, minerals etc. so, we cannot use all our natural resources forever.
Page-33
Q. 2. Where do we get coal from and how is it formed?
Ans. We get coal from earth’s inner layer. Due to natural disasters, forests got buried under the soil, and the excess amount of soil was deposited over them, so the forests were compressed. Due to high temperatures and oxygen, dead plants inside the earth got slowly converted to coal.
Page-37
Q. 3. Boojho: Can coal, petroleum and natural gas be prepared in the laboratory from dead organisms?
Ans. No, their formation is a very slow process and conditions for their formation cannot be created in the laboratory.
Exercise Questions
Q. 1. What are the advantages of using CNG and LPG as fuels?
Ans. CNG and LPG are very important fuels because it is easy to transport them through pipes. CNG (Compressed natural gas) and LPG (Liquefied Petroleum gas) are used for power generation and as non-polluting fuels. Its great advantage is that it can be used directly for burning in homes and factories.
Q. 2. Name the petroleum product used for surfacing of roads.
Ans. The Bitumen, a constituent of petroleum, is used for surfacing roads.
Q. 3. Describe how coal is formed. What is this process called?
Ans. About 300 million years ago the earth had dense forests in low lying wetland areas. Due to earthquakes and volcanic eruptions, these forests got buried under the soil. As more soil deposited over them, they were compressed. The temperature also rose as they sank deeper and deeper. Due to oxygen and high temperature, dead plants inside the earth got slowly converted to coal.
Q. 4. Fill in the blanks:
(i) Fossil fuels are ________, ________and ________.
(ii) Process of separation of different constituents from petroleum is called ________.
(iii) Least polluting fuel for vehicle is ________.
Ans. (i) Coal, Petroleum and Natural gas.
(ii) Refining
(iii) CNG (Compressed Natural gas).
Q. 5. Write True or False against the following statements:
(i) Fossil fuels can be made in the laboratory.
(ii) CNG is more polluting fuel than petrol.
(iii) Coke is almost pure form of carbon.
(iv) Coal-tar is a mixture of various substances.
(v) Kerosene is not a fossil fuel.
Ans. (i) False, (ii) False, (iii) True, (iv) True, (v) False
Q. 6. Explain why fossil fuels are exhaustible natural resources.
Ans. Fossil fuels are exhaustible natural resources because they are made by the decomposition of the dead remains of living organisms. These are present in limited quantity beneath the earth. Thus, it will come to an end by human usage.
Q. 7. Describe characteristics and uses of coke.
Ans. Characteristics of Coke:
(i) Coke is tough, porous and black in colour.
(ii) It is almost the purest form of carbon.
Uses: Coke is used in the manufacturing of steel and in the extraction of many metals.
Q. 8. Explain the process of formation of petroleum.
Ans. Petroleum is believed to be formed from organisms living in the sea. As these organisms died, their bodies settled at the bottom of the sea and got covered with layers of sand and clay. Over millions of years, the dead organisms were transformed into petroleum oil and natural gas and other fossil fuels under the conditions of the absence of air, high temperature and high pressure. Like coal, petroleum and natural gas are also fossil fuels.
Since oil and gas are lighter than water and do not mix with it, they move upward. They are stopped by the overlying rocks which they cannot break through.
Q. 9. The following table shows the total power shortage in India from 1991 to 1997. Show these data in the form of a graph. Plot shortage % on the Y-axis and the year on the X-axis.
Ans.
OR
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🔗 Explore More: Find all NCERT solutions here → NCERT Solutions for Class 1 to 12
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Frequently Asked Questions (FAQs) on Coal and Petroleum Class 8 NCERT Solutions
Q1: What are NCERT Solutions?
A1: NCERT Solutions are detailed, step-by-step answers to the questions provided in the NCERT textbooks. They are designed to help students understand the concepts thoroughly and prepare effectively for their exams.
Q2: Why are NCERT Solutions important for students?
A2: NCERT Solutions are crucial for students because they offer clear explanations and step-by-step guidance on solving textbook problems. They help in building a strong foundation in each subject, making it easier for students to grasp complex concepts and perform well in their exams.
Q3: Are the NCERT Solutions available for free on Xam Content?
A3: Yes, all the NCERT Solutions on our website are available for free. We believe in making education accessible to all students, ensuring that everyone can benefit from our resources without any cost.
Q4: How can NCERT Solutions help in exam preparation?
A4: NCERT Solutions help in exam preparation by providing thorough explanations and solutions to textbook problems. They ensure that students understand the core concepts and are well-prepared for any type of question that may appear in their exams.
Q5:Â Are NCERT solutions enough for scoring good marks in Class 8 Science exams?
A5: Yes, NCERT solutions cover the entire syllabus prescribed by CBSE for Class 8 Science. If students thoroughly understand and practice these solutions, they can definitely score well in their exams. However, it’s also beneficial to supplement your studies with additional reference materials and practice questions. For various types of questions asked in social science exam, you can visit xamcontent.com.
