MCQs – Exam Level

Class: 8 | Subject: Science

Chapter 5: Coal and Petroleum

1. Which of the following is a fossil fuel?
   A) Wood
   B) Coal
   C) Biogas
   D) Wind
   Answer: B) Coal

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2. Coal tar is used for making:
   A) Fertilizers
   B) Roads
   C) Glass
   D) Cement
   Answer: B) Roads

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3. Which product of coal is almost pure carbon?
   A) Coal gas
   B) Coke
   C) Coal tar
   D) Charcoal
   Answer: B) Coke

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4. Petroleum is also known as:
   A) Black soil
   B) Brown fuel
   C) Black gold
   D) Liquid coal
   Answer: C) Black gold

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5. The process of separating petroleum into useful products is called:
   A) Distillation
   B) Filtration
   C) Refining
   D) Evaporation
   Answer: C) Refining

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6. Which is the cleanest fossil fuel?
   A) Coal
   B) Petroleum
   C) Diesel
   D) Natural gas
   Answer: D) Natural gas

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7. Which petroleum product is used for surfacing roads?
   A) Petrol
   B) Diesel
   C) Bitumen
   D) Kerosene
   Answer: C) Bitumen

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8. CNG is mainly used as:
   A) Lubricant
   B) Fertilizer
   C) Fuel
   D) Plastic
   Answer: C) Fuel

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9. Fossil fuels are called non-renewable because they:
   A) Are costly
   B) Cause pollution
   C) Take millions of years to form
   D) Are solid fuels
   Answer: C) Take millions of years to form

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10. Which of the following is NOT a petroleum product?
    A) Petrol
    B) Paraffin wax
    C) Coke
    D) Diesel
    Answer: C) Coke

 

One-Page Quick Revision Sheet

Class: 8 | Subject: Science

Chapter 5: Coal and Petroleum

🌍 Fossil Fuels

• Coal, Petroleum, Natural Gas
• Formed from dead plants & animals
• Take millions of years → Non-renewable

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🪨 Coal

• Used as fuel
• Products:
  • Coke – Almost pure carbon (fuel, steel)
  • Coal Tar – Roads, dyes, naphthalene
  • Coal Gas – Fuel

Memory: C³ → Coke | Coal Tar | Coal Gas

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🛢️ Petroleum

• Also called Black Gold
• Found deep inside Earth
• Separated by Refining (Fractional Distillation)

Petroleum Products (Top → Bottom):

Gas → Petrol → Kerosene → Diesel → Lubricating Oil → Paraffin Wax → Bitumen

Memory Sentence:
Good People Keep Doing Lovely Public Business

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🔥 Natural Gas (CNG)

• Cleanest fossil fuel
• High calorific value
• Used in homes & vehicles

Memory: CNG = Clean Natural Gas

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⚠️ Important Exam Points

• Fossil fuels are exhaustible
• Must be conserved
• Excess use causes pollution

VERY IMPORTANT LINE:
“Fossil fuels are non-renewable natural resources formed over millions of years.”

 

Mind Map + Easy Memory Tricks

Class: 8 | Subject: Science

Chapter 5: Coal and Petroleum

🌍 CENTRAL IDEA

Fossil Fuels → Coal | Petroleum | Natural Gas

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🪨 COAL

• Products: Coke, Coal Tar, Coal Gas
• Coke: Pure carbon, fuel, making steel
• Coal Tar: Roads, dyes, naphthalene
• Coal Gas: Fuel

Memory Trick: C³ = Coke – Coal Tar – Coal Gas

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🛢️ PETROLEUM

• Also called Black Gold
• Obtained by Refining
• Separated by Fractional Distillation

Products (Top → Bottom):

• Petroleum Gas (LPG)
• Petrol
• Kerosene
• Diesel
• Lubricating Oil
• Paraffin Wax
• Bitumen

Memory Trick: G P K D L P B
Sentence: Good People Keep Doing Lovely Public Business

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🔥 NATURAL GAS (CNG)

• Cleanest fossil fuel
• High calorific value
• Less pollution

Memory Trick: CNG = Clean – Natural – Gas

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⚠️ IMPORTANT CONCEPT

• Fossil fuels are Non-renewable
• Take millions of years to form
• Limited resources → Must conserve

Exam Line: “Fossil fuels are exhaustible natural resources formed from dead organisms over millions of years.”

 

Important Exam Questions

Class: 8 | Subject: Science

Chapter 5: Coal and Petroleum

Types: VSA / SA / LA

A. Very Short Answer Questions (VSA)

1. What are fossil fuels?
2. Name any one fossil fuel.
3. Which fossil fuel is in gaseous form?
4. Name the purest form of carbon.
5. What is petroleum also called?
6. Name one product obtained from petroleum.
7. Which fuel is considered the cleanest fossil fuel?
8. Where is coal gas obtained from?

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B. Short Answer Questions (SA)

1. Why are fossil fuels called non-renewable resources?
2. What are the main products obtained from coal?
3. State two advantages of CNG.
4. What is coke? Mention one use.
5. What is petroleum refining?
6. Why is petroleum called “black gold”?
7. Write two uses of coal tar.

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C. Long Answer Questions (LA)

1. Explain the formation of fossil fuels.
2. Describe the process of refining petroleum.
3. Explain the various products obtained from coal and their uses.
4. Why should we conserve fossil fuels? Explain.
5. Discuss the advantages of using CNG as a fuel.

 

Worksheet – FULL Answers (Step-by-Step)

Class: 8 | Science

Chapter 5: Coal and Petroleum

A. Very Short Answer Questions (VSA)

1. What are fossil fuels?
   Fossil fuels are fuels formed from the remains of plants and animals buried under the earth for millions of years.
2. Name one solid fossil fuel.
   Coal.
3. What is coke?
   Coke is a tough, porous, black substance and a pure form of carbon.
4. Which fuel is called the cleanest fossil fuel?
   Compressed Natural Gas (CNG).
5. Name one product obtained from petroleum.
   Petrol.

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B. Short Answer Questions (SA)

1. Why are fossil fuels called non-renewable?
   Fossil fuels take millions of years to form and are available in limited quantities. Once used, they cannot be replaced quickly.
2. What are the main products obtained from coal?
   Coke, coal tar, and coal gas.
3. Why is CNG preferred over petrol and diesel?
   CNG produces less pollution, gives more energy, and leaves no residue.
4. What is petroleum refining?
   Petroleum refining is the process of separating crude oil into useful components called fractions.
5. Write two uses of coal tar.
   (i) Making roads
   (ii) Manufacturing dyes and chemicals

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C. Long Answer Questions (LA)

1. Explain the formation of fossil fuels.
   Millions of years ago, plants and animals died and got buried under layers of soil. Due to high pressure and temperature, they slowly converted into coal, petroleum, and natural gas.
2. Describe the process of refining petroleum.
   Crude oil is heated in a refinery. Different fractions separate at different temperatures and are collected separately.
3. Explain the uses of coke, coal tar, and coal gas.
   Coke: Used as fuel and in steel making.
   Coal tar: Used in roads, medicines, dyes.
   Coal gas: Used as fuel.
4. Why should we conserve fossil fuels?
   Fossil fuels are limited and cause pollution. Conserving them helps protect the environment and ensures availability for future generations.

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D. Fill in the Blanks

1. Coal is a solid fossil fuel.
2. Petroleum is also called black gold.
3. CNG gas is used as a fuel in homes and vehicles.
4. Coal tar is used for making roads.

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E. True or False

1. Petroleum is a renewable resource – False
2. Coke is a pure form of carbon – True
3. Natural gas produces less pollution – True
4. Coal gas is obtained during the processing of coal – True

 

Worksheet – Coal and Petroleum

Class: 8 | Chapter: 5

Instructions: Answer all questions. Practice neatly.

A. Very Short Answer Questions (VSA)

1. What are fossil fuels?
2. Name one solid fossil fuel.
3. What is coke?
4. Which fuel is called the cleanest fossil fuel?
5. Name one product obtained from petroleum.

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B. Short Answer Questions (SA)

1. Why are fossil fuels called non-renewable sources of energy?
2. What are the main products obtained from coal?
3. Why is CNG preferred over petrol and diesel?
4. What is petroleum refining?
5. Write two uses of coal tar.

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C. Long Answer Questions (LA)

1. Explain the formation of fossil fuels.
2. Describe the process of refining petroleum.
3. Explain the uses of coke, coal tar, and coal gas.
4. Why should we conserve fossil fuels?

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D. Fill in the Blanks

1. Coal is a ________ fossil fuel.
2. Petroleum is also called ________.
3. ________ gas is used as a fuel in homes and vehicles.
4. Coal tar is used for making ________.

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E. True or False

1. Petroleum is a renewable resource. (True / False)
2. Coke is a pure form of carbon. (True / False)
3. Natural gas produces less pollution. (True / False)
4. Coal gas is obtained during the processing of coal. (True / False)

 

MCQs – Coal and Petroleum (Exam Level)

Class: 8 | Chapter: 5

1. Fossil fuels are formed from the remains of:
   ① Plants only
   ② Animals only
   ③ Plants and animals
   ④ Microorganisms


2. Which of the following is a solid fossil fuel?
   ① Petroleum
   ② Natural gas
   ③ Coal
   ④ CNG


3. Coke is obtained from:
   ① Petroleum
   ② Natural gas
   ③ Coal
   ④ Wood


4. Which fuel is considered the cleanest fossil fuel?
   ① Coal
   ② Petrol
   ③ Diesel
   ④ Natural gas


5. Petroleum is also known as:
   ① Coal oil
   ② Black gold
   ③ White fuel
   ④ Mineral coal


6. The process of separating petroleum into different components is called:
   ① Distillation
   ② Evaporation
   ③ Refining
   ④ Condensation


7. Which product of coal is used in the manufacture of steel?
   ① Coal tar
   ② Coke
   ③ Natural gas
   ④ Petrol


8. CNG stands for:
   ① Compressed Natural Gas
   ② Carbon Natural Gas
   ③ Compressed Nitrogen Gas
   ④ Coal Natural Gas


9. Fossil fuels are called non-renewable because:
   ① They are cheap
   ② They are easily available
   ③ They take millions of years to form
   ④ They are renewable


10. Which of the following is NOT a product of petroleum?
    ① Petrol
    ② Diesel
    ③ Coal tar
    ④ LPG