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Lakhmir Singh Science Class 8 Solutions Coal and Petroleum (Chapter 5)

Lakhmir Singh Solutions for Class 8 Science Chapter 5 describes the two main fuels that are most frequently used in today’s world. The chapter of Lakhmir Singh Solutions also helps you understand natural gas and how natural resources are getting exhausted due to their large consumptions and uncontrolled usage. The other main topics of the chapter include coal, formation and uses of coal, refining of petroleum, natural gas and natural resources, fossil fuels, exhaustible and inexhaustible natural resources.

It is an important chapter which you need to study to clear your concepts about coal and petroleum. In this chapter, you will also come to know about some natural resources that are limited in nature. Chapter 5 of Lakhmir Singh Solutions for Class 8 Science consists of a total of 5 exercises with 65 questions in total. With the help of our solutions, you can understand them all.

We have undergone thorough research to get accurate solutions for you. We have arranged the Lakhmir Singh Science Class 8 Solutions for Chapter 4 so that you can go through them one at a time and step up the ladder of self-confidence as you go through them. Also, you can follow the solutions anywhere and at any time.

Important Topics for Lakhmir Singh Solutions for Class 8 Science Chapter 5

Here, some main topics and sub-topics of Chapter 5 – Coal and Petroleum are described below. Refer to have a clear understanding of the chapter.

Coal and Petroleum

Coal and petroleum are formed from the degradation of ancient plant life. These dead plant matter continued to pile up, ultimately forming a substance called peat. Over time, heat and pressure from geological processes converted these substances into coal. Since these are generated from essentially fossils, they are also called fossil fuels.

How Coal Is Formed?

Ancient plants gave rise to a very thick layer of dead disintegrated substance packing down plant matter washing away all the decomposed matter. Physical and chemical changes took place as a result of heat and temperature removing all oxygen separating the plant layers with carbon-rich content, thus causing the formation of coal over a period of time.

Types of Coal

Coal is a readily flammable rock comprising more than 50% by weight of carbon. Generally, there are three types of coal available including Lignite, Bituminous, and Anthracite.

Petroleum

Petroleum is a fossil fuel that certainly occurs in the liquid form produced by the decomposition of organic matter underneath the surface of the earth millions of years ago. These fossil fuels are then developed into usable materials such as petrol, kerosene, etc. It is generated by the grouping of hydrocarbons and other materials, mainly sulphur.

Products of Petroleum

Products of petroleum are achieved as a result of purifying crude oil in oil refineries. There are several products that are produced from petroleum and its by-products. Few of the products achieved from petroleum include gasoline, diesel oil, kerosene, tar, heavy fuel oil, petroleum coke, lubricants, special naphthas, paraffin wax, and aviation gasoline.

Uses of Petroleum

Petroleum is one of the most essential and extensively used fuels in today’s time. Some of its benefits are:

  • It is transportation fuel.
  • Kerosene is used for domestic purposes.
  • Oil is used to generate electricity at homes and shops
  • Diesel is used to power turbines for generating electricity in large scale industries.
  • Oils help lubricate diverse types of high-end machines used in various industries, hospitals, etc.
  • Used by chemical industries to create plastic, dyes, paints, pesticides, synthetic rubber, perfumes, etc.

Exercise-Wise Discussion of Lakhmir Singh and Manjit Kaur Solutions of Class 8 Science Chapter 5 – Coal and Petroleum

Lakhmir Singh Solutions for Class 8 Science Chapter 5 – Coal and Petroleum consists of 5 exercises with a total of 65 questions in total. Here below, experts at Intsasolv has provided the exercise-wise discussion for Lakhmir Singh Solutions of Class 8 Science.

Exercise 1 – Very Short Answer Type Questions

The first exercise of the chapter has around 23 questions which are very short answer type questions. These questions are based on the two main fuels that are most frequently used in today’s world. 

Exercise 2 – Short Answer Type Questions

This exercise has around 19 questions which are entirely based on topics like coal, formation and uses of coal, refining of petroleum, natural gas and natural resources, fossil fuels, exhaustible and inexhaustible natural resources. 

Exercise 3 – Long Answer Type Questions

This exercise set has a total of 8 questions in which you need to give proper reasoning of the situation mentioned. 

Exercise 4 – Multiple Choice Questions (MCQs)

This exercise set has a total of 12 questions in which you need to choose the right answer from the options available. 

Exercise 5 – Questions Based on High Order Thinking

This exercise set has a total of 3 questions in which you need to tell the reasoning why a situation happened. This exercise also has a diagram question which makes it easier for you to understand the question.

If you face issues in solving the questions, you can refer to Lakhmir Singh Class 8 Science Solutions Chapter 5 prepared by the experts at Instasolv.

Benefits of Lakhmir Singh and Manjit Kaur Solutions for Class 8 Science Chapter 5 – Coal and Petroleum

Instasolv provides advanced methods to study online. Due to this reason, it stands out of all other platforms. Along with the Lakhmir Singh and Manjit Kaur Solutions for Class 8 Science Chapter 5 – Coal and Petroleum, Instasolv provides access to all other chapter solutions as well. Also, one of the main advantages of our solutions is that we cover all the questions and sub-questions of the exercises that can be downloaded anywhere and anytime. You can access the Lakhmir Singh Solutions for ‘Coal and Petroleum’ Chapter for FREE!