Class Notes - Coal & Petroleum Class 8 Notes | EduRev

Class 8 : Class Notes - Coal & Petroleum Class 8 Notes | EduRev

 Page 1


BAL BHARATI PUBLIC SCHOOL, PITAMPURA, DELHI-110034        
 
CLASS - 8 Term II (2013-2014) 
 
Coal & Petroleum  
 
Chemistry Notes 
 
Q1 How are natural resources classified? 
Ans Natural resources are of two types : 
(a) Exhaustible resources 
(b) Inexhaustible resources 
 
Q2 Identify the following as Exhaustible or inexhaustible resources 
Forest ,Wildlife, Air, Water ,Soil , Minerals 
Ans Exhaustible: forest, wildlife, minerals 
Inexhaustible: air, water, soil 
 
Q3 Why is coal called a fossil fuel? 
Ans Coal is called a fossil fuel as it is formed by the decomposition of plants and trees 
buried under the surface of the earth long ago. 
 
Q4 What is carbonization? 
Ans The slow chemical conversion of wood into coal is called carbonization. 
 
Q5 Name the elements present in coal. 
Ans Coal contains carbon, hydrogen ,oxygen, nitrogen ,sulphur and phosphorus. 
 
Q6 What are the different varieties of coal? 
Ans The different varieties of coal are: 
a)Peat b)Lignite c)Bituminous d)Anthracite 
 
Q7.What are the various products obtained by processing of coal along with their uses? 
Name this process. 
Ans The various products obtained by processing of coal are 
Page 2


BAL BHARATI PUBLIC SCHOOL, PITAMPURA, DELHI-110034        
 
CLASS - 8 Term II (2013-2014) 
 
Coal & Petroleum  
 
Chemistry Notes 
 
Q1 How are natural resources classified? 
Ans Natural resources are of two types : 
(a) Exhaustible resources 
(b) Inexhaustible resources 
 
Q2 Identify the following as Exhaustible or inexhaustible resources 
Forest ,Wildlife, Air, Water ,Soil , Minerals 
Ans Exhaustible: forest, wildlife, minerals 
Inexhaustible: air, water, soil 
 
Q3 Why is coal called a fossil fuel? 
Ans Coal is called a fossil fuel as it is formed by the decomposition of plants and trees 
buried under the surface of the earth long ago. 
 
Q4 What is carbonization? 
Ans The slow chemical conversion of wood into coal is called carbonization. 
 
Q5 Name the elements present in coal. 
Ans Coal contains carbon, hydrogen ,oxygen, nitrogen ,sulphur and phosphorus. 
 
Q6 What are the different varieties of coal? 
Ans The different varieties of coal are: 
a)Peat b)Lignite c)Bituminous d)Anthracite 
 
Q7.What are the various products obtained by processing of coal along with their uses? 
Name this process. 
Ans The various products obtained by processing of coal are 
(a) Coke: Extraction of metals and manufacturing of steel 
(b) Coal tar: To make drugs ,dyes, explosives 
(c) Coal gas: As a fuel in industries and lighting purposesQ8 How is petroleum formed? 
Ans Petroleum is formed from the decomposition of dead remains of plants and animals 
buried under the seabed .The action of high temperature, pressure and absence of air 
converted them into crude oil. 
 
Q9 What is refining of petroleum? Name the products obtained by this process and give 
their uses? 
Ans Process of separating petroleum into usable and useful fractions by fractional distillation 
is known as refining. Refer to page 60 ,table5.1 of N.C.E.R.T. for remaining answer 
 
Q10 What are petrochemicals? Give their uses. 
Ans The useful substances which are obtained from petroleum and natural gas are called  
petrochemicals. They are used for making synthetic fibres ,plastics ,perfumes, explosives 
etc. 
 
Q11 What is the main component of natural gas? Why is it called an ideal fuel? 
Ans Natural gas mainly contains methane gas . it is called an ideal fuel because it does not 
produce any poisonous gas on burning, hence it is a clean fuel. 
***** 
Read More
Offer running on EduRev: Apply code STAYHOME200 to get INR 200 off on our premium plan EduRev Infinity!

Complete Syllabus of Class 8

Content Category

Related Searches

Summary

,

Extra Questions

,

MCQs

,

practice quizzes

,

Semester Notes

,

Exam

,

Viva Questions

,

Class Notes - Coal & Petroleum Class 8 Notes | EduRev

,

Sample Paper

,

Previous Year Questions with Solutions

,

Free

,

Class Notes - Coal & Petroleum Class 8 Notes | EduRev

,

past year papers

,

Important questions

,

shortcuts and tricks

,

Class Notes - Coal & Petroleum Class 8 Notes | EduRev

,

ppt

,

video lectures

,

pdf

,

study material

,

Objective type Questions

,

mock tests for examination

;