Students may better prepare for the Class 10 board exams by using the material provided in the NCERT Solutions Science. This knowledge is extremely crucial as it assists students in better comprehending difficult subject matter. Checking how well you understand a certain subject by reading the solutions to the questions asked in the textbook is a great way to figure out where your knowledge is strongest and where it needs improvement. Our subject matter specialists have designed these NCERT Solutions for Class 10 Science in such a manner that the students will have a much better understanding of all of the subjects that are included in the curriculum for CBSE Class 10 Science.
Students are able to create a strong conceptual basis with the help of the NCERT Solutions PDFs available at SWC. This base plays a key part in the students’ preparation for the latter phases of the competitive examinations. We give comprehensive answers to challenges posed by NCERT in accordance with the methodology provided by CBSE. The students are able to effortlessly prepare all of the ideas that are presented in their respective courses better and more successfully, and they are even able to succeed in passing the most difficult competitive examinations, such as JEE Main, JEE Advanced, NEET, AIMS, and so on.
Your academic journey begins a new stage as you reach the eighth grade, and a new facet of learning awaits you. This is the year where pupils begin to acquire an interest in the topic at hand, and it is also the year in which you choose whether you will study business, humanity, or science in the following year (class 12). As a consequence of this, having a solid foundation of knowledge in fields such as mathematics and physics comes highly recommended. The NCERT textbook for class 8 is the greatest book now available on the market for enhancing one’s education in the areas of mathematics and science. Read up on the theory that is presented in the book for grade 8 and answer all of the questions that are posed in the practice section of the NCERT textbook.
When working through the exercises in the NCERT textbook, if you run into any type of difficulty or uncertainty, you may use the SWC NCERT Solutions for class 8 as a point of reference. While you are reading the theory from the textbook, it is imperative that you always have notes prepared. You should make an effort to understand things from the very beginning so that you may create a solid foundation in the topic. Use the NCERT as your parent book to ensure that you have a strong foundation. After you have finished reading the theoretical section of the textbook, you should go to additional reference books.
NCERT SOLUTION FOR CLASS 8 SCIENCE CHAPTER 5 COAL AND PETROLEUM – Exercises
Question 1. What are the advantages of using CNG and LPG as fuels?
Solution : The advantages of using CNG and LPG as fuels are as follow:
1.CNG and LPG can be transported easily through pipe lines.
2.CNG and LPG burn easily.
3.CNG and LPG are clean fuels and they do not release smoke when burnt.
4.CNG and LPG give a lot of heat energy when burnt.
Question 2. Name the petroleum product used for surfacing of roads.
Solution : Bitumen.
Question 3. Describe how coal is formed from dead vegetation. What is this process called?
Solution : Million years ago, earth was having dense forests in low lying wet land 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 raised as they sank deeper and deeper. Due to high temperature and lack of oxygen dead plants inside the earth got slowly converted to coal. This process of coal formation is called carbonization.
Question 4. Fill in the blanks.
(a) Fossil fuels are ________, ______________, and ________________.
(b) Process of separation of different constituents from petroleum is called______.
(c) Least polluting fuel for vehicle is ________________.
Solution :
(a) Coal, Petroleum and Natural gas.
(b) Refining
(c) CNG
Question 5. Tick true/False against the following statements.
(a) Fossils fuels can be made in laboratory. (T/F)
(b) CNG is more polluting fuel than petrol. (T/F)
(c) Coke is almost pure form of carbon. (T/F)
(d) Coal tar is a mixture of various substances. (T/F)
(e) Kerosene is not a fossil fuel. (T/F)
Solution :
(a) F
(b) F
(c) T
(d) T
(e) F
Question 6. Explain why fossil fuels are exhaustible natural resources.
Solution : The process of formation of fossil fuels requires millions of years. Dead vegetation and animals that get buried deep inside the earth require high temperature and pressure for the formation of fossil fuels, which cannot be done in the laboratory. Thus, fossils are limited. Therefore, the use of fossil fuels at this rate will lead to their exhaustion.
Question 7. Describe characteristics and uses of coke.
Solution : Coke is a tough porous black substance. It is almost pure form of carbon. It is used in the manufacture of steel and in the extraction of many metals.
Question 8. Explain the process of formation of petroleum.
Solution : Petroleum is formed from organism living in the sea. When these organism died, their bodies settled at the bottom of the sea and got covered with layers of the sand and clay. Over millions of years, they were transformed into petroleum oil and natural gas under the absence of air and presence of high temperature and high pressure.
Question 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. | 1993 | 7.7 |
| 2. | 1994 | 7.5 |
| 3. | 1995 | 8.2 |
| 4. | 1996 | 7.1 |
| 5. | 1997 | 7.7 |
| 6. | 1998 | 9.1 |
| 7. | 1999 | 11.2 |
Solution :
Conclusions for NCERT SOLUTION FOR CLASS 8 SCIENCE CHAPTER 5 COAL AND PETROLEUM
Lacking a solid understanding of scientific principles might have unimaginable repercussions. The NCERT textbook for class 8 science comes highly recommended by a number of different educators. You will not only be able to improve your academic performance by using the appropriate combination of NCERT textbooks and NCERT answers for class 8 science chapter 5, but you will also be able to establish a strong foundation in science. The NCERT answers that were generated by the SWC team are among the finest solutions that are currently accessible on the web.
