🛢️ Coal and Petroleum – MCQs for Class 8 Science

Part 3: Q51 – Q75

Q51. Which fuel is considered the cleanest fossil fuel?

A) Coal
B) Diesel
C) CNG
D) Petrol

✅ Correct Answer: C) CNG

Explanation:

• A) Coal – Produces smoke and SO₂.
• B) Diesel – Produces soot and NOx.
• C) CNG – ✔ Burns with almost no smoke, very clean fuel.
• D) Petrol – Cleaner than coal/diesel, but not as clean as CNG.

Q52. Which of the following is NOT a product of destructive distillation of coal?

A) Coke
B) Coal tar
C) Petroleum
D) Coal gas

✅ Correct Answer: C) Petroleum

Explanation:

• A) Coke – ✔ From coal.
• B) Coal tar – ✔ From coal.
• C) Petroleum – ✔ Formed separately in nature, not from coal distillation.
• D) Coal gas – ✔ By-product of coal.

Q53. Which is the chief component of biogas?

A) Ethane
B) Butane
C) Methane
D) Propane

✅ Correct Answer: C) Methane

Explanation:

• A, B, D – Found in LPG.
• C) Methane – ✔ Biogas contains 50–70% methane.

Q54. Which of these resources is exhaustible?

A) Coal
B) Petroleum
C) Natural gas
D) All of these

✅ Correct Answer: D) All of these

Explanation:

• A, B, C – All are fossil fuels, exhaustible.
• D) All of these – ✔ Correct.

Q55. Which fraction of petroleum is used in lamps and stoves?

A) Petrol
B) Kerosene
C) Diesel
D) Bitumen

✅ Correct Answer: B) Kerosene

Explanation:

• A) Petrol – Vehicles.
• B) Kerosene – ✔ Used in lamps and stoves.
• C) Diesel – Trucks, tractors.
• D) Bitumen – Road surfacing.

Q56. What is the main disadvantage of fossil fuels?

A) Renewable
B) Non-renewable and polluting
C) Abundant
D) Cheap

✅ Correct Answer: B) Non-renewable and polluting

Explanation:

• A) Renewable – False.
• **B) ✔ Main issue: cause pollution and are limited.
• C) Abundant – Wrong, they are limited.
• D) Cheap – False, they are costly to extract.

Q57. Which petroleum fraction is used for making paints and solvents?

A) Petrol
B) Kerosene
C) Naphtha
D) Diesel

✅ Correct Answer: C) Naphtha

Explanation:

• A, B, D – Used mainly as fuels.
• C) Naphtha – ✔ Used in chemical industry for solvents and paints.

Q58. Which of these is an inexhaustible natural resource?

A) Coal
B) Petroleum
C) Wind energy
D) Natural gas

✅ Correct Answer: C) Wind energy

Explanation:

• A, B, D – Exhaustible fossil fuels.
• C) Wind energy – ✔ Renewable and inexhaustible.

Q59. Which gas is formed when coal is burnt in limited oxygen supply?

A) CO₂
B) CO
C) SO₂
D) CH₄

✅ Correct Answer: B) CO

Explanation:

• A) CO₂ – Complete combustion.
• B) CO – ✔ Poisonous gas formed during incomplete combustion.
• C) SO₂ – Produced from sulphur impurities.
• D) CH₄ – Methane, not produced here.

Q60. Which petroleum fraction is used for surfacing roads?

A) Petrol
B) Diesel
C) Bitumen
D) Wax

✅ Correct Answer: C) Bitumen

Explanation:

• A, B – Fuels.
• C) Bitumen – ✔ Used in road construction.
• D) Wax – Used in candles and ointments.

Q61. Which is the correct order of coal types from least to most pure carbon?

A) Peat → Anthracite → Lignite → Bituminous
B) Lignite → Peat → Bituminous → Anthracite
C) Peat → Lignite → Bituminous → Anthracite
D) Lignite → Bituminous → Peat → Anthracite

✅ Correct Answer: C) Peat → Lignite → Bituminous → Anthracite

Explanation:

• A, B, D – Wrong sequences.
• C) ✔ Correct order of coal formation.

Q62. Which of the following is used as a domestic fuel in rural areas?

A) CNG
B) Kerosene
C) LPG
D) Firewood and cow dung cakes

✅ Correct Answer: D) Firewood and cow dung cakes

Explanation:

• A, B, C – Modern fuels.
• D) ✔ Commonly used in rural India.

Q63. What is the main use of petroleum coke?

A) Domestic fuel
B) Metallurgical industry
C) Road construction
D) Cooking

✅ Correct Answer: B) Metallurgical industry

Explanation:

• A, C, D – Not correct.
• B) ✔ Petroleum coke used as reducing agent in metallurgical processes.

Q64. Which country in Asia had the first oil well drilled?

A) India
B) China
C) Japan
D) Iran

✅ Correct Answer: A) India

Explanation:

• A) India – ✔ Digboi, Assam was Asia’s first oil well.
• B, C, D – Did not have the first.

Q65. Which gas causes suffocation if coal burns in closed space?

A) CO₂
B) CO
C) CH₄
D) SO₂

✅ Correct Answer: B) CO

Explanation:

• A) CO₂ – Causes drowsiness, but less poisonous.
• B) CO – ✔ Binds with haemoglobin, fatal.
• C) CH₄ – Explosive gas.
• D) SO₂ – Irritant gas, not suffocating.

Q66. Which fossil fuel is most abundant in India?

A) Coal
B) Petroleum
C) Natural gas
D) CNG

✅ Correct Answer: A) Coal

Explanation:

• A) Coal – ✔ India has huge coal reserves.
• B, C, D – Lesser availability.

Q67. Which is NOT a use of natural gas?

A) Power generation
B) Fertiliser industry
C) Domestic cooking
D) Road surfacing

✅ Correct Answer: D) Road surfacing

Explanation:

• A, B, C – All uses of natural gas.
• D) Road surfacing – ✔ Done using bitumen, not natural gas.

Q68. Which petroleum fraction is used in making plastics?

A) Petrol
B) Diesel
C) Naphtha
D) Bitumen

✅ Correct Answer: C) Naphtha

Explanation:

• A, B, D – Mainly fuels/construction.
• C) Naphtha – ✔ Raw material for petrochemicals and plastics.

Q69. Which gas is used in compressed form as vehicle fuel?

A) LPG
B) CNG
C) Coal gas
D) Producer gas

✅ Correct Answer: B) CNG

Explanation:

• A) LPG – Domestic cooking.
• B) CNG – ✔ Compressed Natural Gas → vehicles.
• C, D – By-products, not vehicle fuels.

Q70. Which fossil fuel emits the least carbon dioxide when burnt?

A) Coal
B) Diesel
C) Petrol
D) Natural gas

✅ Correct Answer: D) Natural gas

Explanation:

• A, B, C – Release more CO₂.
• D) Natural gas – ✔ Burns most cleanly.

Q71. What is petroleum called because of its high value?

A) Black diamond
B) Black gold
C) Liquid fuel
D) Earth oil

✅ Correct Answer: B) Black gold

Explanation:

• A) Black diamond – Coal.
• B) Black gold – ✔ Petroleum.
• C, D – Not used.

Q72. Which petroleum product is used in making floor polish?

A) Diesel
B) Wax
C) Petrol
D) Bitumen

✅ Correct Answer: B) Wax

Explanation:

• A, C, D – Fuels and construction.
• B) Wax – ✔ Used in polish and ointments.

Q73. Which gas is produced in large amount when coal is burnt completely?

A) CO
B) SO₂
C) CO₂
D) NO₂

✅ Correct Answer: C) CO₂

Explanation:

• A) CO – Incomplete combustion.
• B) SO₂ – Impurity gas.
• C) CO₂ – ✔ Major gas during complete combustion.
• D) NO₂ – From vehicles, not coal.

Q74. Which of these is a use of coal gas?

A) Road surfacing
B) Domestic fuel in earlier times
C) Jet fuel
D) Vehicle fuel

✅ Correct Answer: B) Domestic fuel in earlier times

Explanation:

• A, C, D – Not correct.
• B) Coal gas – ✔ Used as fuel for cooking and lighting before electricity.

Q75. Which is the purest form of coal?

A) Bituminous
B) Anthracite
C) Lignite
D) Peat

✅ Correct Answer: B) Anthracite

Explanation:

• A) Bituminous – Less carbon.
• B) Anthracite – ✔ Highest carbon, hardest, cleanest.
• C) Lignite – Lower carbon.
• D) Peat – Least carbon.

Coal and Petroleum Class 8 MCQs, CBSE Class 8 Science MCQs, NCERT Class 8 Coal Petroleum, Online Learning Science MCQs, Important MCQs Class 8, cbse class 8 science coal and petroleum mcqs with answers, ncert class 8 coal and petroleum objective questions, important mcqs for class 8 coal and petroleum board exams, online learning mcqs for class 8 science coal and petroleum, chapter wise mcqs for class 8 science coal and petroleum