Chapter 14 – Sources of Energy – MCQs
Chapter 14 – Sources of Energy – MCQs (Part 1: Q1–Q25)
Q1. Which of the following is a renewable source of energy?
a) Coal
b) Petroleum
c) Solar energy
d) Natural gas
✅ Answer: c) Solar energy
Explanation: Solar energy is inexhaustible and renewable, unlike fossil fuels.
Q2. Which of the following is a non-renewable energy source?
a) Wind
b) Coal
c) Solar
d) Tidal
✅ Answer: b) Coal
Explanation: Coal is a fossil fuel that cannot be replenished once used up.
Q3. Which device converts solar energy directly into electricity?
a) Solar cooker
b) Solar panel
c) Solar water heater
d) Wind turbine
✅ Answer: b) Solar panel
Explanation: Solar panels (photovoltaic cells) directly convert sunlight into electricity.
Q4. Which of the following fuels produces the least pollution?
a) Coal
b) Diesel
c) Petrol
d) CNG
✅ Answer: d) CNG
Explanation: Compressed Natural Gas burns completely with fewer pollutants.
Q5. Which of the following is NOT a conventional source of energy?
a) Coal
b) Petroleum
c) Wind energy
d) Natural gas
✅ Answer: c) Wind energy
Explanation: Wind energy is non-conventional; coal, petroleum, and natural gas are conventional.
Q6. Which of the following is an exhaustible source of energy?
a) Sunlight
b) Wind
c) Biomass
d) Petroleum
✅ Answer: d) Petroleum
Explanation: Petroleum reserves are limited and get exhausted with continuous use.
Q7. Which of the following is a disadvantage of using coal as a fuel?
a) Causes air pollution
b) Causes acid rain
c) Produces greenhouse gases
d) All of these
✅ Answer: d) All of these
Explanation: Burning coal leads to air pollution, acid rain, and global warming.
Q8. The largest source of energy on Earth is:
a) Wind
b) Sun
c) Water
d) Fossil fuels
✅ Answer: b) Sun
Explanation: The Sun is the ultimate source of all energy on Earth, directly or indirectly.
Q9. Biogas mainly consists of:
a) Carbon dioxide
b) Methane
c) Hydrogen
d) Oxygen
✅ Answer: b) Methane
Explanation: Methane (CH₄) is the main component of biogas, making it a good fuel.
Q10. Which of the following is a disadvantage of nuclear energy?
a) Produces greenhouse gases
b) Risk of radioactive waste
c) Limited fuel reserves
d) Both b and c
✅ Answer: d) Both b and c
Explanation: Nuclear power poses risks of radioactive waste and limited uranium reserves.
Q11. Which of the following is an example of a biomass fuel?
a) Biogas
b) Coal
c) Diesel
d) Petrol
✅ Answer: a) Biogas
Explanation: Biogas is produced from cow dung and plant waste, hence biomass.
Q12. Which of the following is NOT an advantage of wind energy?
a) Renewable
b) Non-polluting
c) Can be set up everywhere
d) Eco-friendly
✅ Answer: c) Can be set up everywhere
Explanation: Wind energy requires windy areas; it cannot be used everywhere.
Q13. Which of the following is used in solar cookers to trap sunlight?
a) Glass lid
b) Plane mirror
c) Concave mirror
d) Convex lens
✅ Answer: a) Glass lid
Explanation: The glass lid traps heat inside the solar cooker by greenhouse effect.
Q14. Which of the following energy sources is obtained from the Earth’s interior?
a) Solar energy
b) Wind energy
c) Geothermal energy
d) Nuclear energy
✅ Answer: c) Geothermal energy
Explanation: Geothermal energy is obtained from heat stored inside the Earth.
Q15. Which of the following is the best fuel for vehicles to reduce air pollution?
a) Petrol
b) Diesel
c) CNG
d) Kerosene
✅ Answer: c) CNG
Explanation: CNG is a clean fuel that reduces air pollution compared to petrol or diesel.
Q16. Which of the following is a disadvantage of solar energy?
a) Non-polluting
b) Available in abundance
c) Cannot be used at night
d) Renewable
✅ Answer: c) Cannot be used at night
Explanation: Solar energy is not available at night or during cloudy days.
Q17. Hydropower plants use:
a) Solar radiation
b) Wind
c) Flowing water
d) Coal
✅ Answer: c) Flowing water
Explanation: Hydropower plants convert the kinetic energy of flowing water into electricity.
Q18. Which of the following is NOT a non-conventional source of energy?
a) Solar energy
b) Wind energy
c) Hydropower
d) Tidal energy
✅ Answer: c) Hydropower
Explanation: Hydropower is conventional as it has been used for a long time.
Q19. Which of the following fuels is formed from dead plants?
a) Coal
b) Petrol
c) Biogas
d) Diesel
✅ Answer: a) Coal
Explanation: Coal is formed from the remains of plants buried under Earth millions of years ago.
Q20. The main advantage of tidal energy is that it is:
a) Polluting
b) Inexhaustible
c) Produces greenhouse gases
d) Non-renewable
✅ Answer: b) Inexhaustible
Explanation: Tidal energy is renewable and does not pollute.
Q21. Which of the following is NOT a disadvantage of fossil fuels?
a) Cause air pollution
b) Cause global warming
c) Renewable
d) Cause acid rain
✅ Answer: c) Renewable
Explanation: Fossil fuels are non-renewable, which is a disadvantage.
Q22. Which of the following is used in thermal power plants?
a) Coal
b) Solar energy
c) Wind
d) Water
✅ Answer: a) Coal
Explanation: Thermal power plants burn coal to produce electricity.
Q23. Which of the following is the cleanest source of energy?
a) Solar energy
b) Wind energy
c) Hydropower
d) All of these
✅ Answer: d) All of these
Explanation: All these renewable sources are clean and pollution-free.
Q24. Which of the following is a disadvantage of using wood as fuel?
a) Renewable
b) Causes deforestation
c) Produces smoke
d) Both b and c
✅ Answer: d) Both b and c
Explanation: Using wood leads to deforestation and air pollution due to smoke.
Q25. Which of the following is NOT a property of an ideal source of energy?
a) Easily available
b) Produces large amount of energy
c) Produces pollution
d) Economical
✅ Answer: c) Produces pollution
Explanation: An ideal source of energy should be pollution-free.
Sources of Energy – MCQs (Part 2: Q26–Q50)
Q26. Which of the following is an example of a non-conventional energy source?
a) Coal
b) Solar energy
c) Petrol
d) Diesel
✅ Answer: b) Solar energy
Explanation: Solar energy is renewable and non-conventional, unlike fossil fuels.
Q27. The main constituent of biogas is:
a) Carbon dioxide
b) Methane
c) Hydrogen
d) Nitrogen
✅ Answer: b) Methane
Explanation: Methane (CH₄) forms about 60–70% of biogas, making it highly combustible.
Q28. Which of the following energy sources is NOT derived from the Sun?
a) Wind energy
b) Biomass energy
c) Tidal energy
d) Solar energy
✅ Answer: c) Tidal energy
Explanation: Tidal energy is caused by the gravitational pull of the Moon, not the Sun.
Q29. Which of the following is a disadvantage of wind energy?
a) It is renewable
b) It is pollution-free
c) Wind turbines require large open areas
d) It is eco-friendly
✅ Answer: c) Wind turbines require large open areas
Explanation: Wind energy is clean but needs vast windy areas, which is a limitation.
Q30. Which of the following is used in nuclear power plants?
a) Uranium
b) Coal
c) Natural gas
d) Biogas
✅ Answer: a) Uranium
Explanation: Uranium-235 undergoes fission to release huge amounts of energy in nuclear reactors.
Q31. The process of obtaining energy from moving water is called:
a) Solar energy
b) Hydroelectric power
c) Tidal energy
d) Biomass energy
✅ Answer: b) Hydroelectric power
Explanation: Flowing water rotates turbines to generate hydroelectricity.
Q32. Which of the following is the main disadvantage of nuclear energy?
a) Produces CO₂
b) Radioactive waste disposal
c) Renewable
d) Eco-friendly
✅ Answer: b) Radioactive waste disposal
Explanation: Nuclear energy does not emit CO₂, but managing radioactive waste is a major issue.
Q33. Which of the following is an example of a fossil fuel?
a) Biogas
b) Coal
c) Solar energy
d) Wind energy
✅ Answer: b) Coal
Explanation: Coal is a fossil fuel formed from decomposed plants buried millions of years ago.
Q34. Which of the following is a disadvantage of using hydropower plants?
a) Renewable
b) Eco-friendly
c) Causes deforestation and displacement
d) Produces no pollution
✅ Answer: c) Causes deforestation and displacement
Explanation: Large dams submerge forests and displace local people.
Q35. Which of the following is an example of direct solar energy use?
a) Solar cooker
b) Biogas
c) Hydroelectric power
d) Wind energy
✅ Answer: a) Solar cooker
Explanation: Solar cookers use sunlight directly for heating and cooking.
Q36. Which of the following is a non-renewable resource?
a) Coal
b) Wind
c) Sunlight
d) Biomass
✅ Answer: a) Coal
Explanation: Coal reserves are limited and cannot be replenished once exhausted.
Q37. The main fuel used in thermal power plants is:
a) Wind
b) Coal
c) Uranium
d) Solar
✅ Answer: b) Coal
Explanation: Thermal plants burn coal to generate electricity.
Q38. Which of the following is an advantage of biogas?
a) Produces good manure
b) Reduces deforestation
c) Produces less smoke
d) All of these
✅ Answer: d) All of these
Explanation: Biogas is renewable, smokeless, reduces fuelwood use, and provides manure.
Q39. Which of the following is NOT a property of an ideal fuel?
a) Cheap and easily available
b) Produces high energy
c) Produces large amount of smoke
d) Easy to store
✅ Answer: c) Produces large amount of smoke
Explanation: An ideal fuel should be clean-burning and smokeless.
Q40. Which of the following is a disadvantage of tidal energy?
a) Renewable
b) Requires construction of dams across rivers
c) Non-polluting
d) Available in coastal regions
✅ Answer: b) Requires construction of dams across rivers
Explanation: Tidal energy projects need special dams, which are expensive and location-specific.
Q41. Which of the following is NOT a disadvantage of fossil fuels?
a) Limited reserves
b) Air pollution
c) Renewable in nature
d) Cause global warming
✅ Answer: c) Renewable in nature
Explanation: Fossil fuels are non-renewable, which is their main drawback.
Q42. Which of the following is NOT a biomass fuel?
a) Wood
b) Cow dung
c) Biogas
d) Petrol
✅ Answer: d) Petrol
Explanation: Petrol is a fossil fuel, not a biomass-based fuel.
Q43. Which of the following devices uses sunlight to heat water?
a) Solar cooker
b) Solar panel
c) Solar water heater
d) Solar furnace
✅ Answer: c) Solar water heater
Explanation: Solar water heaters use solar radiation to heat water directly.
Q44. Which of the following sources of energy is most reliable?
a) Solar energy
b) Wind energy
c) Nuclear energy
d) Tidal energy
✅ Answer: c) Nuclear energy
Explanation: Nuclear power can produce electricity continuously, unlike solar or wind.
Q45. Which of the following produces electricity using sea waves?
a) Solar energy
b) Tidal energy
c) Wave energy
d) Geothermal energy
✅ Answer: c) Wave energy
Explanation: The kinetic energy of sea waves is harnessed to produce electricity.
Q46. Which of the following is NOT a disadvantage of nuclear power plants?
a) Risk of accidents
b) Disposal of radioactive waste
c) Production of greenhouse gases
d) Limited uranium reserves
✅ Answer: c) Production of greenhouse gases
Explanation: Nuclear power does not produce greenhouse gases during operation.
Q47. Which of the following renewable sources is available throughout the day and night?
a) Solar
b) Wind
c) Geothermal
d) Biomass
✅ Answer: c) Geothermal
Explanation: Geothermal energy is constant and not dependent on weather or day-night cycles.
Q48. Which of the following is a disadvantage of solar cookers?
a) Eco-friendly
b) Works only on sunny days
c) Pollution-free
d) Cheap to use
✅ Answer: b) Works only on sunny days
Explanation: Solar cookers cannot work at night or on cloudy days.
Q49. Which of the following fuels is the cleanest for cooking?
a) Coal
b) Wood
c) LPG
d) Kerosene
✅ Answer: c) LPG
Explanation: Liquefied Petroleum Gas burns cleanly without smoke and harmful residues.
Q50. Which of the following is an example of indirect solar energy?
a) Solar cooker
b) Biogas
c) Solar panel
d) Solar heater
✅ Answer: b) Biogas
Explanation: Biogas is produced from plants, which derive their energy from the Sun.
Sources of Energy – MCQs (Part 3: Q51–Q75)
Q51. Which of the following is a fossil fuel?
a) Biogas
b) Coal
c) Wood
d) Charcoal
✅ Answer: b) Coal
Explanation: Coal is formed from dead plants buried and compressed over millions of years.
Q52. Which of the following is a renewable source of energy?
a) Petroleum
b) Natural gas
c) Solar energy
d) Coal
✅ Answer: c) Solar energy
Explanation: Solar energy is inexhaustible and renewable.
Q53. Which of the following gases is produced the most in a biogas plant?
a) CO₂
b) CH₄
c) H₂
d) O₂
✅ Answer: b) CH₄
Explanation: Methane is the chief constituent of biogas, making it a good fuel.
Q54. Which of the following is the ultimate source of all energy on Earth?
a) Wind
b) Water
c) Sun
d) Fossil fuels
✅ Answer: c) Sun
Explanation: Sun drives photosynthesis, wind, water cycle, and even fossil fuel formation.
Q55. Which of the following does NOT produce greenhouse gases?
a) Burning coal
b) Using solar cookers
c) Burning petrol
d) Burning wood
✅ Answer: b) Using solar cookers
Explanation: Solar cookers use direct sunlight and are completely pollution-free.
Q56. The energy obtained from moving air is called:
a) Solar energy
b) Wind energy
c) Hydro energy
d) Geothermal energy
✅ Answer: b) Wind energy
Explanation: Wind turbines convert kinetic energy of moving air into electricity.
Q57. Which of the following sources of energy is eco-friendly?
a) Coal
b) Petroleum
c) Solar
d) Diesel
✅ Answer: c) Solar
Explanation: Solar energy is renewable, abundant, and non-polluting.
Q58. Which of the following is the main limitation of hydropower plants?
a) Renewable source
b) Expensive to construct
c) Produces no pollution
d) Easy to install
✅ Answer: b) Expensive to construct
Explanation: Building dams requires heavy investment and causes ecological issues.
Q59. Which of the following does NOT depend on the Sun?
a) Solar energy
b) Biomass
c) Wind energy
d) Geothermal energy
✅ Answer: d) Geothermal energy
Explanation: Geothermal energy comes from the Earth’s interior heat, not the Sun.
Q60. Which of the following is NOT an example of biomass?
a) Wood
b) LPG
c) Cow dung
d) Agricultural waste
✅ Answer: b) LPG
Explanation: LPG is a petroleum product, not a biomass fuel.
Q61. Which of the following statements about nuclear energy is true?
a) It produces large amounts of greenhouse gases
b) It is renewable
c) It produces large amounts of energy from small fuel
d) It is completely safe
✅ Answer: c) It produces large amounts of energy from small fuel
Explanation: Nuclear fission of uranium releases huge energy from a small quantity of fuel.
Q62. Which of the following is the cleanest fuel for domestic use?
a) Coal
b) Kerosene
c) LPG
d) Firewood
✅ Answer: c) LPG
Explanation: LPG burns without smoke and leaves no residue, making it clean.
Q63. Which of the following is NOT a disadvantage of solar panels?
a) High installation cost
b) Works only during daytime
c) Produces pollution while working
d) Requires large space
✅ Answer: c) Produces pollution while working
Explanation: Solar panels do not pollute; other limitations include cost and weather dependence.
Q64. Which of the following is an advantage of tidal energy?
a) Available everywhere
b) Renewable and pollution-free
c) Cheap installation
d) Constant throughout the year
✅ Answer: b) Renewable and pollution-free
Explanation: Tidal energy is renewable and clean, though site-specific.
Q65. Which of the following is a disadvantage of fossil fuels?
a) Renewable
b) Non-renewable and polluting
c) Abundant supply
d) Low cost
✅ Answer: b) Non-renewable and polluting
Explanation: Fossil fuels cause pollution and are exhaustible.
Q66. Which of the following is used in thermal power plants to heat water?
a) Coal
b) Wind
c) Sunlight
d) Water
✅ Answer: a) Coal
Explanation: Thermal plants burn coal to boil water and produce steam for turbines.
Q67. Which of the following is a renewable energy resource?
a) Petroleum
b) Diesel
c) Wind
d) Coal
✅ Answer: c) Wind
Explanation: Wind energy is renewable and inexhaustible.
Q68. Which of the following is a disadvantage of using wood as fuel?
a) Causes deforestation
b) Produces smoke
c) Low calorific value compared to LPG
d) All of these
✅ Answer: d) All of these
Explanation: Using wood leads to deforestation, pollution, and less energy efficiency.
Q69. Which of the following is the process of splitting a heavy nucleus into lighter nuclei?
a) Nuclear fusion
b) Nuclear fission
c) Radioactive decay
d) Ionization
✅ Answer: b) Nuclear fission
Explanation: Nuclear fission releases a huge amount of energy in nuclear reactors.
Q70. Which of the following is the process of combining light nuclei to form heavier nuclei?
a) Nuclear fission
b) Nuclear fusion
c) Radioactivity
d) Combustion
✅ Answer: b) Nuclear fusion
Explanation: Fusion occurs in the Sun, where hydrogen atoms combine to form helium.
Q71. Which of the following is NOT an advantage of biogas?
a) Produces manure
b) Renewable
c) High installation cost in villages
d) Reduces deforestation
✅ Answer: c) High installation cost in villages
Explanation: Initial installation is costly, though it has many benefits later.
Q72. Which of the following devices uses concave mirrors to concentrate solar energy?
a) Solar cooker
b) Solar water heater
c) Solar panel
d) Biogas plant
✅ Answer: a) Solar cooker
Explanation: Concave mirrors in solar cookers focus sunlight to generate heat.
Q73. Which of the following is the main advantage of geothermal energy?
a) Pollution-free and renewable
b) Available everywhere
c) Very cheap to install
d) Works only in coastal areas
✅ Answer: a) Pollution-free and renewable
Explanation: Geothermal energy is clean, renewable, but site-specific.
Q74. Which of the following is NOT a conventional energy source?
a) Coal
b) Solar energy
c) Petroleum
d) Natural gas
✅ Answer: b) Solar energy
Explanation: Solar is non-conventional; coal, petroleum, and natural gas are conventional.
Q75. Which of the following is a limitation of wind energy?
a) Requires windy areas
b) Renewable and pollution-free
c) Reduces greenhouse gases
d) Can generate electricity
✅ Answer: a) Requires windy areas
Explanation: Wind energy is location-dependent and cannot work everywhere.
Sources of Energy – MCQs (Part 4: Q76–Q100)
Q76. Which of the following is a disadvantage of nuclear fusion energy?
a) Produces radioactive waste
b) Difficult to control on Earth
c) Non-renewable
d) Produces greenhouse gases
✅ Answer: b) Difficult to control on Earth
Explanation: Fusion requires very high temperature and pressure, making it difficult to achieve on Earth.
Q77. Which of the following is NOT an advantage of hydropower?
a) Renewable source
b) Causes no air pollution
c) Low installation cost
d) Provides irrigation facilities
✅ Answer: c) Low installation cost
Explanation: Hydropower plants are costly to build, though renewable and clean.
Q78. Which of the following energy sources is least polluting?
a) Solar energy
b) Coal
c) Petrol
d) Diesel
✅ Answer: a) Solar energy
Explanation: Solar energy is completely pollution-free during operation.
Q79. Which of the following is the best example of biomass energy?
a) Wood
b) Biogas
c) Cow dung cakes
d) All of these
✅ Answer: d) All of these
Explanation: Biomass energy includes fuels from organic matter like wood, dung, and biogas.
Q80. Which of the following is a disadvantage of geothermal energy?
a) Renewable
b) Pollution-free
c) Site-specific availability
d) Provides constant supply
✅ Answer: c) Site-specific availability
Explanation: Geothermal energy is limited to volcanic and tectonic regions.
Q81. Which of the following is used in a solar cell?
a) Copper
b) Silicon
c) Aluminium
d) Iron
✅ Answer: b) Silicon
Explanation: Solar cells are made of semiconductors like silicon to convert sunlight into electricity.
Q82. Which of the following is a limitation of LPG as a fuel?
a) Produces smoke
b) Non-renewable
c) Produces ash
d) Difficult to transport
✅ Answer: b) Non-renewable
Explanation: LPG is clean and efficient, but it is derived from petroleum, which is non-renewable.
Q83. Which of the following is an example of tidal energy use?
a) Solar water heater
b) Dam built across sea inlets
c) Biogas plant
d) Hydroelectric plant
✅ Answer: b) Dam built across sea inlets
Explanation: Tidal energy is harnessed by constructing dams across sea inlets.
Q84. Which of the following is NOT an ideal property of a good fuel?
a) High calorific value
b) Produces less smoke
c) Easily available
d) Produces maximum residue
✅ Answer: d) Produces maximum residue
Explanation: An ideal fuel should produce minimum residue after burning.
Q85. Which of the following is the main disadvantage of wave energy?
a) Non-renewable
b) Uneven and site-specific
c) Produces smoke
d) Requires fossil fuels
✅ Answer: b) Uneven and site-specific
Explanation: Wave energy depends on strong sea waves, which are not available everywhere.
Q86. Which of the following is the calorific value of biogas?
a) 10–15 kJ/g
b) 20–25 kJ/g
c) 30–35 kJ/g
d) 50–60 kJ/g
✅ Answer: c) 30–35 kJ/g
Explanation: Biogas has a calorific value of around 33–35 kJ/g due to high methane content.
Q87. Which of the following is NOT a non-conventional energy source?
a) Nuclear energy
b) Wind energy
c) Solar energy
d) Tidal energy
✅ Answer: a) Nuclear energy
Explanation: Nuclear energy is considered conventional because it has been used for decades.
Q88. Which of the following is the best way to reduce air pollution?
a) Using CNG vehicles
b) Using coal more
c) Burning waste plastics
d) Using diesel engines
✅ Answer: a) Using CNG vehicles
Explanation: CNG burns completely, releasing fewer pollutants.
Q89. Which of the following is NOT used to generate electricity?
a) Wind turbine
b) Hydroelectric dam
c) Solar panel
d) Biogas stove
✅ Answer: d) Biogas stove
Explanation: Biogas stoves are for cooking, not for generating electricity.
Q90. Which of the following is the major drawback of fossil fuels?
a) Low energy
b) Abundant supply
c) Cause pollution and are non-renewable
d) Cheap to use
✅ Answer: c) Cause pollution and are non-renewable
Explanation: Fossil fuels cause greenhouse effect and will eventually get exhausted.
Q91. Which of the following is an example of nuclear fusion?
a) Energy from atomic bombs
b) Energy from the Sun
c) Energy in nuclear reactors
d) Both a and c
✅ Answer: b) Energy from the Sun
Explanation: The Sun produces energy through fusion of hydrogen nuclei.
Q92. Which of the following is the most environment-friendly source of energy?
a) Solar energy
b) Coal
c) Petroleum
d) Natural gas
✅ Answer: a) Solar energy
Explanation: Solar energy is abundant, renewable, and non-polluting.
Q93. Which of the following is used as a moderator in nuclear reactors?
a) Graphite
b) Sand
c) Oxygen
d) Carbon dioxide
✅ Answer: a) Graphite
Explanation: Graphite slows down neutrons, enabling sustained nuclear fission.
Q94. Which of the following is the main disadvantage of thermal power plants?
a) Produce greenhouse gases
b) Low installation cost
c) Use renewable fuel
d) Easy to set up
✅ Answer: a) Produce greenhouse gases
Explanation: Thermal plants release CO₂ and SO₂, causing pollution and global warming.
Q95. Which of the following is a limitation of solar energy?
a) Abundant supply
b) Renewable
c) Storage and weather dependence
d) Pollution-free
✅ Answer: c) Storage and weather dependence
Explanation: Solar energy cannot be harnessed effectively at night or during cloudy weather.
Q96. Which of the following sources has the highest energy density?
a) Coal
b) Wood
c) Uranium
d) LPG
✅ Answer: c) Uranium
Explanation: Nuclear fuels like uranium produce enormous energy per unit mass.
Q97. Which of the following is the main advantage of biogas plants in rural areas?
a) Provides electricity
b) Provides fuel and manure
c) Produces coal
d) Produces petrol
✅ Answer: b) Provides fuel and manure
Explanation: Biogas provides fuel for cooking and slurry for use as fertilizer.
Q98. Which of the following is an example of energy obtained from Earth’s interior?
a) Solar energy
b) Geothermal energy
c) Wind energy
d) Nuclear energy
✅ Answer: b) Geothermal energy
Explanation: Geothermal energy is derived from the Earth’s internal heat.
Q99. Which of the following fuels is ideal for vehicles in big cities to reduce pollution?
a) Petrol
b) Diesel
c) CNG
d) Coal
✅ Answer: c) CNG
Explanation: CNG is clean-burning and reduces air pollution in cities.
Q100. Which of the following is the most sustainable combination for future energy needs?
a) Coal and petroleum
b) Solar and wind energy
c) Diesel and coal
d) Wood and kerosene
✅ Answer: b) Solar and wind energy
Explanation: Renewable sources like solar and wind are clean, sustainable, and abundant.
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FAQ Section
Q1. What is the importance of Sources of Energy Class 10 MCQs for CBSE exams?
Ans: MCQs on Sources of Energy help students understand renewable and non-renewable resources, energy efficiency, and exam-relevant concepts for scoring well.
Q2. What type of questions are asked from Sources of Energy in Class 10 Science Board Exams?
Ans: Questions include definitions, examples of renewable and non-renewable energy, advantages and disadvantages, and applications of various energy sources.
Q3. Which sources of energy are most emphasized in Class 10 CBSE Science?
Ans: Solar energy, wind energy, hydropower, biomass, geothermal, nuclear energy, and fossil fuels are frequently covered in the exam syllabus.
Q4. Why are non-conventional energy sources important for Class 10 Science?
Ans: Non-conventional sources like solar, wind, and tidal energy are clean, renewable, and eco-friendly, helping in sustainable development.
Q5. How can I prepare Sources of Energy MCQs effectively for the board exam?
Ans: Revise NCERT thoroughly, practice solved MCQs with explanations, focus on energy flow, advantages/disadvantages, and practice past CBSE papers.
