NCERT Solutions for Class 8 Science Chapter 5 Coal and Petroleum

Edited By Vishal kumar | Updated on Sep 16, 2023 10:46 AM IST

NCERT Solutions Class 8 Science Chapter 5 – Access and Download Free PDF

NCERT Solutions for Class 8 Science Chapter 5 Coal and Petroleum are an essential tool for achieving high scores in the Class 8 exams. On the Careers360 page of NCERT Solution, you'll find comprehensive and detailed class 8 science chapter 5 question answer that provide step-by-step guidance through the chapter. These coal and petroleum class 8 ncert solutions are carefully designed to help you gain a thorough understanding of the concepts and perform exceptionally well in your examinations.

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NCERT Solutions Class 8 Science Chapter 5 – Access and Download Free PDF
NCERT Solutions for Class 8 Science Chapter 5 Coal and Petroleum: Solved Questions
NCERT Solutions For Class 8 Science- Chapter-Wise
Coal And Petroleum Class 8 Science Chapter 5-Topics
Key Features of Class 8 Science Chapter 5 NCERT Solutions
Study Well!

NCERT Solutions for Class 8 Science Chapter 5 Coal and Petroleum

Our subject experts have created these solutions of NCERT for Class 8 Science chapter 5 Coal and Petroleum with the primary goal of assisting students in obtaining good marks in the CBSE examination. Exploring these CBSE NCERT solutions for Class 8 Science Chapter 5 Coal and Petroleum will not only enhance your grasp of the chapter's concepts but also prepare you effectively for your exams. If you encounter any challenges while answering the questions, the class 8 science chapter 5 ncert solutions are readily available to provide guidance. You can also access NCERT solutions spanning from Classes 6 to 12 to further enhance your science knowledge.

Have you ever thought of, from where coal comes from or from where petrol comes from, which is used to operate different means of transport? In this chapter along with CBSE NCERT solutions for Class 8 Science chapter 5 Coal and Petroleum, you will get to know about the different types of resources which you use in daily life.

You know that different type of resources is used to fulfil our basic needs. Resource means something which is useful for us like sun, water, air, forest and on the other hand medicine, as well as vehicles, are also examples of resources. Now you can see, some of them which are mentioned above are found in nature and some have been made through human efforts. All these concepts will be learned in this chapter.

**In the latest CBSE Syllabus for 2023-24, Chapter 5, "Coal and Petroleum," has been removed from the Class 8 Science curriculum.

Free download coal and petroleum class 8 questions and answers PDF for CBSE exam.

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NCERT Solutions for Class 8 Science Chapter 5 Coal and Petroleum: Solved Questions

Q1. What are the advantages of using CNG and LPG as fuels?

Answer:

Advantages of using CNG and LPG-

These are less polluting and cleaner fuel.
They can be burnt directly.
Transportation of these fuels is easily through the pipeline system.
CNG and LPG have high calorific values.

Q2. Name the petroleum product used for surfacing of roads.

Answer:

These days, bitumen is a petroleum product that is used to surfacing the roads. Previously we use coal-tar for the same purpose.

Q3. Describe how coal is formed from dead vegetation. What is this process called?

Answer:

About 300 million year ago, Due to the natural calamities like flooding, storms and earthquake, the dense forests got buried under the soil. they were compressed, As more soil deposited over them. Under deep in the soil they were exposed to high pressure and high temperature, dead plants and animals slowly converted into coal. These process of conversion called carbonisation.

Q4. 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 __________.

Answer:

(a) Fossil fuels are coal and natural gas.
(b) Process of separation of different constituents from petroleum is called refining.
(c) Least polluting fuel for vehicle is CNG (compressed natural gas) .

Q 5.(a) Tick True/False against the following statements.

Fossil fuels can be made in the laboratory. (T/F)

Answer:

(False) Dead plants and animals were buried inside the earth, deep down they were exposed to high pressure and temperature. under this condition, they slowly convert into Fossil fuels.

Q 5(b) Tick True and False against the following statements

(b) CNG is more polluting fuel than petrol. (T/F)

Answer:

False, it is less polluting and cleaner fuel.

Q 5 (c). Tick True/False against the following statements.

Coke is almost pure form of carbon. (T/F)

Answer:

True,

Q 5 (d). Tick True/False against the following statements.

Coal tar is a mixture of various substances. (T/F)

Answer:

True,

it is a mixture of about 200 substance.

Q 5 (e). Tick True/False against the following statements.

Kerosene is not a fossil fuel. (T/F)
Answer:

False

Q 6. Explain why fossil fuels are exhaustible natural resources.

Answer:

To regenerate, fossils fuels required millions of year. Deep inside the earth, they need high pressure and high temperature and it cannot be obtained in the laboratory. Their rate of conversion from dead vegetation to coal is very slow as compared to their rate of consumption. Therefore, they will exhaust in the near future.

Q 7. Describe characteristics and uses of coke.

Answer:

Characteristics of coke-

tough
porous
black substance

Uses of coke-

In the manufacture of steel
in the extraction of metals

Q 8. Explain the process of formation of petroleum.

Answer:

Petroleum was formed from the dead animals and plants, which live in the sea. when they died, their bodies settled at the bottom of the sea and covered by the layers of soil. After a million years, absence of air, high temperature and pressure transformed these dead organisms into petroleum and natural gas.

Q 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

Answer:

X-axis = 1 unit = 1 year

Y-axis = 1 unit = 2% shortage

Don’t forget to study the story of coal, as it's a very interesting part of NCERT Solutions Class 8 Science chapter 5 Coal and Petroleum. You must be thinking about why it is important to know about these resources, and the answer is, a massive increase in the use of nonrenewable resources due to the increased population.

Now, the point of the issue is that due to high demand and an increase in the population, nonrenewable resources are in danger as they can get exhausted. So, how to decrease their usage as well as how to maintain their quantity is mentioned in Class 8 Science Chapter 5 Coal and Petroleum. You will get all the answers to NCERT solutions for Class 8 Science Chapter 5 Coal and Petroleum here.

Another important topic which you will study in Chapter 5 Coal and Petroleum is Natural gas; it is a very important fossil fuel because it can be easily transferred through pipes. Natural gas is stored under high pressure as compressed natural gas (CNG). It is now being used as a fuel for transport vehicles because it is less polluting.

After going through it properly, it will be easy for you to answer why coal and petroleum are called exhaustible natural resources. What are the advantages of natural gas?

So, try to attempt the NCERT questions. In case, if you have any queries, refer to NCERT solutions for Class 8 Science chapter 5 Coal and Petroleum, it will help you to score more marks in the exam.

NCERT Solutions For Class 8 Science- Chapter-Wise

Chapter 1	Crop Production and Management
Chapter 2	Microorganisms Friend and Foe In Microorganisms
Chapter 3	Synthetic Fibres and Plastics
Chapter 4	Materials Metals and Non Metals
Chapter 5	Coal and Petroleum
Chapter 6	Combustion and Flame
Chapter 7	Conservation of Plants and Animals
Chapter 8	Cell Structure and Functions
Chapter 9	Reproduction in Animals
Chapter 10	Reaching the Age of Adolescence
Chapter 11	Force and Pressure
Chapter 12	Friction
Chapter 13	Sound
Chapter 14	Chemical Effects of Electric Current
Chapter 15	Some Natural Phenomena
Chapter 16	Light
Chapter 17	Stars and the Solar System
Chapter 18	Pollution of Air and Water

Class 8 Science Chapter 12 NCERT Solutions: Important Formulas and Points

Energy

Energy can be derived from natural resources and transferred as heat or work.
There are different types of energy, including mechanical, chemical, thermal, nuclear, solar, wind, sound, and electrical energy.
Energy can change from one form to another, following the law of conservation of energy.

Natural Resources

Natural resources are provided by the Earth and are categorized into two types.
Inexhaustible or renewable natural resources are available in unlimited quantities, such as sunlight and wind.
Exhaustible or non-renewable natural resources are limited in quantity, like coal and petroleum.

Fossil Fuels

Fossil fuels are exhaustible resources formed from the decomposition of organic matter, including coal and natural gas.

Energy Stored in Fossil Fuels

Fossil fuels store energy derived from the decayed remains of animals and plants that existed over millions of years.

Energy Utilization from Fossil Fuels

Industries use approximately 40% of the energy generated from fossil fuels.
The transportation sector consumes around 24% of this energy.
Farms utilize about 6% of fossil fuel energy.
Approximately 30% of the energy is used for domestic and other purposes.

Coal Formation

Coal is a black-coloured fossil fuel extracted from the ground and used for various purposes.
The formation of coal begins with peat.

Peat

Peat is a dark, fibrous fuel made up of partly decomposed plant matter.
It represents the initial stage in the formation of coal.

Formation of Coal

Coal forms when dead vegetation undergoes a transformation under high pressure and temperature.
This process is known as carbonization.

Coal And Petroleum Class 8 Science Chapter 5-Topics

Topics for class 8 science ch 5 question answer are given below:

Inexhaustible Natural Resources
Exhaustible Natural Resources
Coal
Story of Coal
Coke
Fossil fuel
Coal Tar
Coal Gas
Petroleum
Refining of Petroleum
Natural Gas
Some Natural Resources are Limited

Benefits of NCERT Solutions for Class 8 Science Chapter 5 Coal and Petroleum-

Homework will be an easy task with the NCERT solutions for Class 8 Science chapter 5 Coal and Petroleum in hand.
It will give you in-depth knowledge of your subject.
You can score well in the exam with the help of these solutions of NCERT solutions for Class 8 Science chapter 5 Coal and Petroleum.
It will strengthen your fundamental concepts of science.
It will develop your logical approach and methodology towards science and other subjects.
Your homework will be easier with these solutions of NCERT.

Key Features of Class 8 Science Chapter 5 NCERT Solutions

Comprehensive Coverage: The coal and petroleum class 8 solutions helping students understand all the key concepts and topics.
Step-by-Step Explanation: The coal and petroleum class 8 ncert solutions offer step-by-step explanations for each question, making it easier for students to grasp the concepts.
Clear and Concise Language: The class 8 science chapter 5 question answer are written in clear and concise language, ensuring that students can easily follow along.
Concept Clarity: The class 8 coal and petroleum ncert solutions aim to clarify all the concepts presented in the chapter, ensuring that students have a strong understanding of the subject matter.
Exam Preparation: These coal and petroleum class 8 questions and answers serve as an essential tool for exam preparation, helping students score well in their Class 8 exams.
Removal of Chapter: Note that, as per the latest CBSE syllabus for 2023-24, science chapter 5 class 8, "Coal and Petroleum," has been removed. Therefore, students should refer to the updated syllabus for their studies.

Study Well!

NCERT Solutions For Class 8: Subject-Wise

Also Check NCERT Books and NCERT Syllabus here:

Also Read

NCERT Syllabus for Class 8 2024-25 - Download All Subjects PDF

NCERT Solutions for Class 8 Science Chapter 11 Force and Pressure

NCERT Solutions for Class 8 Science Chapter 10 Reaching The age of adolescence

NCERT Solutions for Class 8 Science Chapter 9 Reproduction in Animals

NCERT Solutions for Class 8 Science Chapter 7 Conservation of Plants and Animals

NCERT Solutions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics

NCERT Solutions for Class 8 Science Chapter 2 Microorganisms Friend and Foe

NCERT Books for Class 8 English 2024 - Download PDF

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Popular Questions

A block of mass 0.50 kg is moving with a speed of 2.00 ms^-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1) $0.34\; J$	Option 2) $0.16\; J$
Option 3) $1.00\; J$	Option 4) $0.67\; J$

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up ? Fat supplies 3.8×10⁷J of energy per kg which is converted to mechanical energy with a 20% efficiency rate. Take g = 9.8 ms⁻² :

Option 1)

2.45×10⁻³ kg

Option 2)

6.45×10⁻³ kg

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9.89×10⁻³ kg

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12.89×10⁻³ kg

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Option 1) $2,000 \; J - 5,000\; J$	Option 2) $200 \, \, J - 500 \, \, J$
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In the reaction,

$2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}$

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Option 3) $33.6 L\, H_{2(g)}$ is produced regardless of temperature and pressure for every mole Al that reacts	Option 4) $67.2\, L\, H_{2(g)}$ at STP is produced for every mole Al that reacts .

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Option 1) 0.02	Option 2) 3.125 × 10^-2
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If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1) decrease twice	Option 2) increase two fold
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Option 1) Molality	Option 2) Weight fraction of solute
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Option 1) twice that in 60 g carbon	Option 2) 6.023 × 10²²
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A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t²) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m² , the number of rotations made by the pulley before its direction of motion if reversed, is