CBSE Class 8th Science | Chapter 3 Coal and Petroleum | Part - 1 (Session 2023 - 24)
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💎 In this video,
🖋Class: CBSE Class 8th Science
🖋 Subject: Science
🖋 Chapter: Chapter 3 Coal and Petroleum
✔️ Topics Covered in This Video: Part - 1
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NCERT Exemplar Solution Class 8 Science
Chapter 3 Coal and Petroleum
Question 1.
Name some renewable sources of energy.
Answer:
Water, wind, solar.
Question 2.
Give some examples of fossil fuels.
Answer:
Coal, petroleum, natural gas.
Question 3.
Name the elements present in coal.
Answer:
Carbon, oxygen and sulphur.
Question 4.
Which are the two main techniques of mining?
Answer:
Surface mining and underground mining.
Question 5.
List four varieties of coal.
Answer:
Peat, lignite, bituminous, anthracite.
Question 6.
Name the process of conversion of wood into coal.
Answer:
Carbonisation
Question 7.
Mention the temperature at which destructive distillation is done.
Answer:
1000°C
Question 8.
When the crude oil is referred to be ‘sweet’?
Answer:
If the sulphur content is low.
Question 9.
Name the process of conversion of kerogen into gaseous hydrocarbons.
Answer:
Catagenesis
Question 10.
Name the country which is the leading producer of petroleum.
Answer:
Saudi Arabia
Question 11.
Name the gas that occurs over petroleum in reservoirs deep inside the earth.
Answer:
Natural gas
Question 12.
Expand PCRA.
Answer:
Petroleum Conservation Research Association.
Question 13.
Name two fractions of petroleum which are used as fuel.
Answer:
Petrol and diesel
Question 14.
What kind of pollution is caused by the burning of fossil fuels?
Answer:
Air pollution
Question 15.
Write the full form of LPG.
Answer:
Liquefied Petroleum Gas.
Question l6.
Which gas is produced when coal is burnt in air?
Answer:
Carbon dioxide
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