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Practice Class 8 Science Coal and Petroleum MCQ Questions with Answers based on the latest NCERT syllabus. Learn about CNG, petroleum refining, coal formation, natural resources, and black gold with detailed explanations, exam tips, and original NCERT-based solutions for CBSE and State Board students.
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Chapter Information
Subject: Science
Class: 8
Chapter: Coal and Petroleum
Question Type: Multiple Choice Questions (MCQs)
Difficulty Level: Easy to Moderate
Based On: Latest NCERT Syllabus
Introduction
Coal and petroleum are among the most important natural resources used as sources of energy. They provide fuel for transportation, electricity generation, industries, and households. Since these resources take millions of years to form, they are limited in quantity and must be used wisely. This practice set helps students understand the origin, processing, and conservation of fossil fuels through concept-based MCQs.
What You Will Learn
✔ Storage of natural gas
✔ Petroleum refining process
✔ Formation of coal
✔ Natural and man-made resources
✔ Importance of petroleum
✔ Conservation of fossil fuels
Why This Topic Is Important?
Coal and petroleum are major sources of energy used around the world. Questions from this chapter are frequently asked in CBSE, State Board, Olympiad, and scholarship examinations. Understanding these resources also helps students appreciate the importance of conserving energy for future generations.
Exam Relevance
These questions are useful for:
✔ CBSE Exams
✔ State Board Exams
✔ School Tests
✔ Unit Tests
✔ Half-Yearly Exams
✔ Annual Exams
✔ Olympiad Preparation
✔ Scholarship Examinations
Q1. Natural gas is stored under high pressure as?
A) PNP
B) CNG
C) LPG
D) KLN
Answer: CNG (Compressed Natural Gas)
Concept Behind This Question
Natural gas is compressed to reduce its volume, making it easier and safer to store and transport.
Step-by-Step Solution
Natural gas is stored under high pressure in the form of Compressed Natural Gas (CNG). It is widely used as a cleaner fuel for vehicles because it produces fewer harmful emissions than many conventional fuels.
LPG is a different fuel mainly consisting of propane and butane.
Therefore, the correct answer is: CNG.
Exam Tip
Remember:
- CNG → Compressed Natural Gas
- LPG → Liquefied Petroleum Gas
Q2. The process of separation of different constituents from petroleum is called?
A) Carbonization
B) Filtration
C) Distillation
D) Refining
Answer: Refining
Concept Behind This Question
Crude petroleum contains many useful substances that must be separated before use.
Step-by-Step Solution
Crude petroleum is processed in a petroleum refinery, where it is separated into useful products such as petrol, diesel, kerosene, lubricating oil, paraffin wax, and bitumen.
This complete industrial process is called refining.
Therefore, the correct answer is: Refining.
Exam Tip
Remember:
Crude Petroleum → Refinery → Useful Petroleum Products
Q3. Coal was formed from the remains of?
A) Animals
B) Vegetation
C) None of these
D) Both A and B
Answer: Vegetation
Concept Behind This Question
Coal is a fossil fuel formed from ancient plant material over millions of years.
Step-by-Step Solution
Millions of years ago, dense forests were buried under layers of soil. Due to high pressure and temperature over a very long period, this dead plant material gradually changed into coal.
This process is known as carbonisation.
Therefore, the correct answer is: Vegetation.
Exam Tip
Remember:
Dead Plants → Carbonisation → Coal
Q4. Which of the following is a natural resource?
A) Plastic
B) Air
C) Glass
D) Steel
Answer: Air
Concept Behind This Question
Natural resources are obtained directly from nature without being manufactured by humans.
Step-by-Step Solution
Air is naturally available in the environment and is essential for all living organisms.
Plastic, glass, and steel are manufactured by humans using natural raw materials.
Therefore, the correct answer is: Air.
Exam Tip
Examples of natural resources include:
- Air
- Water
- Soil
- Sunlight
- Forests
- Minerals
Q5. Which of these is called “Black Gold”?
A) Coal
B) Petroleum
C) Carbon
D) Graphite
Answer: Petroleum
Concept Behind This Question
Petroleum has high economic value because it provides many useful fuels and industrial products.
Step-by-Step Solution
Petroleum is popularly known as “Black Gold” because:
- It is dark in colour.
- It is extremely valuable.
- It is used to produce numerous fuels and chemical products.
Its importance in transportation, industries, and daily life makes it one of the world’s most valuable natural resources.
Therefore, the correct answer is: Petroleum.
Exam Tip
Remember:
Petroleum = Black Gold
Important Formulas & Concepts
1. Fossil Fuels
Fossil fuels are formed from the remains of plants and animals over millions of years.
Examples:
- Coal
- Petroleum
- Natural Gas
2. Carbonisation
Carbonisation is the slow process by which buried plant remains are converted into coal under high pressure and temperature.
3. Petroleum Refining
Refining is the industrial process of separating crude petroleum into useful products.
Major products include:
- Petrol
- Diesel
- Kerosene
- Lubricating oil
- Paraffin wax
- Bitumen
4. Natural Gas
Natural gas is mainly stored and transported as:
CNG (Compressed Natural Gas)
It is considered a cleaner fuel because it produces comparatively fewer air pollutants.
5. Natural Resources
Natural resources are materials obtained directly from nature.
Examples:
- Air
- Water
- Soil
- Forests
- Minerals
- Sunlight
6. Petroleum – “Black Gold”
Petroleum is called Black Gold because of its dark colour and great economic importance.
Related Practice Questions
- Why is CNG considered an environmentally friendly fuel?
- What is the difference between CNG and LPG?
- Explain the process of carbonisation.
- Name four products obtained from petroleum refining.
- Why should fossil fuels be conserved?
Mini Quiz Challenge
True or False
- CNG stands for Compressed Natural Gas.
- Coal is formed mainly from ancient vegetation.
- Air is a natural resource.
- Petroleum is known as Black Gold.
- Refining separates different useful products from crude petroleum.
Exam Tips
✔ Learn the full forms of CNG and LPG.
✔ Remember the difference between carbonisation and refining.
✔ Revise important petroleum products.
✔ Know the examples of natural resources.
✔ Understand why fossil fuels should be conserved.
Quick Revision Notes
✔ Natural gas is stored as CNG.
✔ Petroleum is separated by refining.
✔ Coal is formed from ancient vegetation.
✔ Air is a natural resource.
✔ Petroleum is called Black Gold.
✔ Fossil fuels are non-renewable resources.
Common Mistakes Students Make
❌ Confusing CNG with LPG.
❌ Thinking refining and carbonisation are the same process.
❌ Assuming coal is formed from animal remains only.
❌ Considering plastic and steel as natural resources.
❌ Confusing coal with Black Gold.
Key Takeaways
- CNG is the compressed form of natural gas used for storage and transport.
- Refining separates crude petroleum into useful products.
- Coal is formed from ancient plant remains through carbonisation.
- Air is an important natural resource.
- Petroleum is popularly known as Black Gold because of its high economic value.
FAQs
1. What is CNG?
CNG stands for Compressed Natural Gas, which is natural gas stored under high pressure.
2. What is petroleum refining?
Petroleum refining is the industrial process of separating crude petroleum into different useful products such as petrol, diesel, and kerosene.
3. How was coal formed?
Coal was formed from the buried remains of ancient vegetation over millions of years through the process of carbonisation.
4. Which of the following is a natural resource?
Air is a natural resource because it is available directly from nature.
5. Why is petroleum called Black Gold?
Petroleum is called Black Gold because it is dark in colour and has great economic importance due to its many uses.
Conclusion
This Class 8 Science MCQ Practice Set strengthens understanding of the Coal and Petroleum chapter by covering essential concepts such as CNG, petroleum refining, coal formation, natural resources, and fossil fuel conservation. Regular practice of these NCERT-based questions improves conceptual clarity, develops scientific reasoning, and prepares students for school examinations and competitive tests.
NCERT Reference
Book: NCERT Science Class 8
Chapter: Chapter 5 – Coal and Petroleum
Based On: Latest NCERT Curriculum (CBSE)
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