Sources of Energy Part 3: MCQs (Q51–Q75)
🔋 Sources of Energy – MCQs (Class 10 Science, NCERT)
🔹 Part 3: Questions 51–75
Q51. Which of these is a renewable source of energy?
A) Petroleum
B) Solar energy
C) Coal
D) Natural gas
Correct Answer: B) Solar energy
Explanation:
- A, C, D → Non-renewable fossil fuels.
- ✅ B) Solar → Inexhaustible and renewable.
Q52. Which of the following is NOT a disadvantage of thermal power plants?
A) Air pollution
B) Global warming
C) Renewable energy
D) Low efficiency
Correct Answer: C) Renewable energy
Explanation:
- ✅ C) Thermal plants use coal/oil, non-renewable sources.
Q53. Which energy source uses turbine driven by steam?
A) Solar cell
B) Thermal power plant
C) Windmill
D) Hydroelectric plant
Correct Answer: B) Thermal power plant
Explanation:
- ✅ B) Steam from coal/oil burning turns turbines.
Q54. The main constituent of petroleum gas is:
A) Butane
B) Methane
C) Propane
D) Ethane
Correct Answer: A) Butane
Explanation:
- ✅ A) LPG (liquefied petroleum gas) mainly butane + propane.
Q55. Which energy source is pollution-free?
A) Coal
B) Petroleum
C) Solar energy
D) Diesel
Correct Answer: C) Solar energy
Explanation:
- ✅ C) Solar produces no greenhouse gases or smoke.
Q56. The chief component of natural gas is:
A) Ethane
B) Methane
C) Propane
D) Butane
Correct Answer: B) Methane
Explanation:
- ✅ B) Methane (CH₄) ~ 80–90% in natural gas.
Q57. A good source of energy should be:
A) Cheap and easily available
B) High calorific value
C) Cause less pollution
D) All of these
Correct Answer: D) All of these
Explanation:
- ✅ D) A good fuel = economical, efficient, eco-friendly.
Q58. Which of these is used in solar cells?
A) Silicon
B) Copper
C) Iron
D) Aluminium
Correct Answer: A) Silicon
Explanation:
- ✅ A) Semiconductor silicon used in photovoltaic cells.
Q59. Which of these is NOT an advantage of nuclear energy?
A) Produces large energy per unit mass
B) No air pollution
C) Renewable
D) Used in nuclear power plants
Correct Answer: C) Renewable
Explanation:
- ✅ C) Uranium/Thorium reserves are limited, hence non-renewable.
Q60. Which of the following does NOT produce electricity directly?
A) Solar cell
B) Windmill
C) Biogas plant
D) Generator
Correct Answer: C) Biogas plant
Explanation:
- ✅ C) Biogas produces fuel, not electricity directly.
Q61. The minimum wind speed required to run a windmill efficiently is about:
A) 5 km/h
B) 10 km/h
C) 15 km/h
D) 25 km/h
Correct Answer: D) 25 km/h
Explanation:
- ✅ D) Windmills need steady winds ~15–25 km/h or more.
Q62. Which of these is an example of direct solar energy utilization?
A) Solar cooker
B) Biogas plant
C) Hydropower
D) Windmill
Correct Answer: A) Solar cooker
Explanation:
- ✅ A) Direct sunlight → Heat for cooking.
Q63. The calorific value of methane is approximately:
A) 25 kJ/g
B) 50 kJ/g
C) 55 kJ/g
D) 150 kJ/g
Correct Answer: C) 55 kJ/g
Explanation:
- ✅ C) Methane has ~55 kJ/g, high among fuels.
Q64. Which energy is obtained from sea waves?
A) Geothermal
B) Wave energy
C) Ocean thermal energy
D) Tidal energy
Correct Answer: B) Wave energy
Explanation:
- ✅ B) Wave motion converted into electricity.
Q65. Which energy source is practically inexhaustible?
A) Coal
B) Petroleum
C) Solar energy
D) Natural gas
Correct Answer: C) Solar energy
Explanation:
- ✅ C) Sun → Available for billions of years.
Q66. Which is NOT a non-conventional energy source?
A) Solar
B) Tidal
C) Nuclear
D) Wind
Correct Answer: C) Nuclear
Explanation:
- ✅ C) Nuclear = conventional energy source, though non-renewable.
Q67. Which energy source can be produced from animal dung?
A) Biogas
B) Coal gas
C) Natural gas
D) Petroleum gas
Correct Answer: A) Biogas
Explanation:
- ✅ A) Anaerobic digestion of dung → Biogas.
Q68. Which of the following fuels has maximum efficiency?
A) Petrol
B) Diesel
C) Hydrogen
D) Biogas
Correct Answer: C) Hydrogen
Explanation:
- ✅ C) Hydrogen has highest calorific value (~150 kJ/g).
Q69. The disadvantage of geothermal energy is:
A) Renewable source
B) Expensive drilling
C) No greenhouse gas emission
D) Abundant supply
Correct Answer: B) Expensive drilling
Explanation:
- ✅ B) Extraction requires costly drilling and location limits.
Q70. Which is an example of nuclear fusion?
A) Sun’s energy
B) Atomic bombs
C) Nuclear reactors
D) Both A and B
Correct Answer: A) Sun’s energy
Explanation:
- ✅ A) Sun → Fusion of hydrogen nuclei.
- B, C → Fission-based.
Q71. Which form of energy is stored in coal?
A) Heat energy
B) Chemical energy
C) Electrical energy
D) Mechanical energy
Correct Answer: B) Chemical energy
Explanation:
- ✅ B) Coal stores energy in chemical bonds of carbon.
Q72. Which is NOT a disadvantage of fossil fuels?
A) Air pollution
B) Non-renewable
C) High energy per unit mass
D) Causes global warming
Correct Answer: C) High energy per unit mass
Explanation:
- ✅ C) High energy density is an advantage, not disadvantage.
Q73. The major disadvantage of tidal energy is:
A) Renewable source
B) Needs dam at sea shore
C) Eco-friendly
D) Pollution-free
Correct Answer: B) Needs dam at sea shore
Explanation:
- ✅ B) Dams are costly, affect aquatic life.
Q74. Which energy conversion occurs in a solar cell?
A) Heat → Mechanical
B) Light → Electrical
C) Light → Chemical
D) Mechanical → Electrical
Correct Answer: B) Light → Electrical
Explanation:
- ✅ B) Photovoltaic effect converts light into electricity.
Q75. Which is NOT true about wind energy?
A) Renewable source
B) Produces noise
C) Causes air pollution
D) Depends on wind speed
Correct Answer: C) Causes air pollution
Explanation:
- ✅ C) Wind energy is clean and does not pollute air.
Sources of Energy MCQs, Class 10 Science Questions, NCERT Class 10 Science, CBSE Board Exam Practice, Online Learning Science, Sources of energy class 10 science MCQs with answers, CBSE class 10 board exam important sources of energy questions, NCERT syllabus-based sources of energy class 10 practice questions. Online learning quiz on sources of energy class 10 science, Important MCQs on sources of energy for CBSE class 10 science