Coal and Petroleum is a chapter in class 8th science book. This chapter talks about various fuels like coal and petroleum. These fuels takes millions of years for the formation and we should use them cautiously. Let us check Coal and Petroleum NCERT Solutions for Class 8
Coal and Petroleum NCERT Solutions
Q.1. Make a list of various materials used by us in daily life and classify them as natural and man-made materials.
Ans 1.
Natural materials: Air, water, Minerals, Vegetables, fruits etc
Man-made materials: Car, scooter, TV, mobile, radio etc
Question 2: Does this list include air, soil, water and minerals
And 2: Yes, this list includes air, water, and soil.
Question 3: Can we use all our natural resources forever?
Ans 3: No, we can not use all our resources forever. They will exhaust if we keep them using without thinking about our upcoming generations.
Question 4: Can air, soil and water be exhausted by human activities?
Ans 4: No, these resources will no finish by human activities
Question 5: Is water a limitless resource?
Ans 5: No water is a limitless resource but freshwater can be finished if we do not use it cautiously. Freshwater is present in a very less percentage compared to the total amount of water present on earth’s surface.
Coal and Petroleum Quick Revision: Class 8
Question 6: What are the advantages of using LPG and CNG as fuels?
Ans 6:
LPG and CNG are cleaner fuels
They can be easily stored.
They are cheaper as compared to other fuel alternatives
Question 7: Name the petroleum product used for surfacing of roads
Ans 7: The product used for surfacing of roads is Bitumen.
Question 8: Describe how coal is formed from dead vegetation. What is this process called?
Ans 8: Earth had very dense forests in the beginning. With the passage of time, due to weathering and other phenomena, the dead vegetation got buried deep inside the earth’s surface. It experienced pressure for a very long time and this caused the formation 0f coal. We call this method carbonization.
Question 9: Fill in the blanks:
1. Fossil fuels are Coal and Petroleum
2.Process of separation of different constituents from petroleum is called Refining
3.Least polluting fuel for vehicles is Compressed Natural Gas (CNG )
Question 10: Mark the following as True/False.
(a) Fossil fuels can be made in the laboratory. False
(b) CNG is more polluting fuel as compared to petrol. False
(c) Coke is an almost pure form of carbon. True
(d) Coaltar is a mixture of various substances. True
(e) Kerosene is not a fossil fuel. False
Question 11: Explain why fossil fuels are exhaustible natural resources.
Ans 11: Fossil fuels are exhaustible resources because they are nonrenewable and will finish if we keep using them uncautiously. It took millions of years for the formation of coal and petroleum.
Question 12: Describe the characteristics and uses of coke.
Ans 12:
1) Coke is the purest form of carbon.
2) Coke is made by heating coal in the absence of air, by a destructive distillation process.
3) If we talk about its nature, it is tough in nature.
4. It is porous in nature.
5) It is used as fuel in stoves.
Question 13: Explain the process of the formation of petroleum.
Ans 13: The marine life living under the sea gets buried after their death. With the passage of millions of years, they get buried deep down and with high temperature, pressure and absence of the air they converted into petroleum. This petroleum is then extracted by different methods.
This was Deepak Kumar to discuss Coal and petroleum NCERT solutions. Hope you found the answers useful. If you want to ask any other questions from this chapter, you can ask us through the comment section below. Don’t forget to subscribe to Careeradvice4u for more NCERT Solutions for Class 7, 8, 9, and 10.
Deepak Kumar is the founder of careeradvice4u.com. He is a Professional Blogger, web designer, and a highly experienced teacher too. He has done Computer Science from Delhi University and has 9 years of teaching experience. He teaches various subjects upto XII class and above that also. He has helped thousands of students to excel in academics. He had in his mind from a very long time to use his blogging passion for the help of School, college students, and other job seekers. Careeradvice4u will bring to you all the information and stuff that you need to shape up your career. He is also the founder of successfully growing tech blog: techadvises.com and also runs his own digital marketing agency, xPress Web Solutions, which deals in all types of web solutions
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