Coal and Petroleum Part 3: MCQs (Q51–Q75)
🛢️ 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.
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