ANAND CLASSES’S Best Study Material and Notes which explore 100+ multiple-choice questions (MCQs) on GK Non-Renewable Energy Sources (Fossil Fuels) for the All India Sainik Schools Entrance Examination (AISSEE) Class 6. Get detailed answers and explanations to enhance your knowledge of coal, petroleum, natural gas, environmental effects, and sustainable alternatives.
MCQs on GK Non-Renewable Energy Sources (Fossil Fuels) for All India Sainik Schools Entrance Examination (AISSEE) Class 6 GK
1. What are fossil fuels?
A) Renewable sources of energy
B) Energy sources formed from decomposed plants and animals
C) Solar energy sources
D) Wind energy sources
Answer: B) Energy sources formed from decomposed plants and animals
Explanation: Fossil fuels, such as coal, oil, and natural gas, are formed from the remains of ancient plants and animals buried under layers of rock and subjected to heat and pressure over millions of years.
2. Which of the following is NOT a fossil fuel?
A) Coal
B) Natural gas
C) Petroleum
D) Biomass
Answer: D) Biomass
Explanation: Biomass is considered a renewable energy source because it comes from organic material that can be replenished, unlike fossil fuels, which take millions of years to form.
3. What is the main component of natural gas?
A) Carbon dioxide
B) Oxygen
C) Methane
D) Hydrogen
Answer: C) Methane
Explanation: Natural gas is primarily composed of methane (CH4), a hydrocarbon that is used for heating, electricity generation, and fuel.
4. What type of coal has the highest carbon content?
A) Peat
B) Lignite
C) Bituminous
D) Anthracite
Answer: D) Anthracite
Explanation: Anthracite is the highest grade of coal with the highest carbon content, making it the most efficient and cleanest-burning form of coal.
5. Which of the following is a disadvantage of fossil fuels?
A) Unlimited availability
B) Environmentally friendly
C) Non-renewable and causes pollution
D) Does not produce carbon dioxide
Answer: C) Non-renewable and causes pollution
Explanation: Fossil fuels are non-renewable, meaning they will eventually deplete, and their combustion releases pollutants such as carbon dioxide (CO₂), contributing to global warming and air pollution.
6. Which of the following fossil fuels is a liquid?
A) Coal
B) Petroleum
C) Natural gas
D) Peat
Answer: B) Petroleum
Explanation: Petroleum, also known as crude oil, is a liquid fossil fuel that is refined to produce gasoline, diesel, and other useful products.
7. Which process is responsible for the formation of fossil fuels?
A) Photosynthesis
B) Decomposition under high pressure and temperature
C) Nuclear fusion
D) Evaporation
Answer: B) Decomposition under high pressure and temperature
Explanation: Fossil fuels are formed over millions of years when organic matter (plants and animals) is buried under sedimentary layers, where heat and pressure transform them into coal, oil, or natural gas.
8. What is petroleum commonly known as?
A) Black diamond
B) Crude oil
C) Natural gas
D) Solid fuel
Answer: B) Crude oil
Explanation: Petroleum is commonly known as crude oil before it is refined into different fuels such as gasoline, diesel, and kerosene.
9. Which country is the largest producer of crude oil in the world?
A) Russia
B) Saudi Arabia
C) United States
D) Canada
Answer: C) United States
Explanation: The United States is the largest producer of crude oil due to advancements in extraction technologies like hydraulic fracturing (fracking).
10. What is the main use of coal?
A) Cooking food
B) Generating electricity
C) Making plastics
D) Producing oxygen
Answer: B) Generating electricity
Explanation: Coal is primarily used in thermal power plants to generate electricity by burning it to produce steam, which drives turbines.
11. Which type of coal is the lowest in carbon content and energy efficiency?
A) Bituminous
B) Lignite
C) Anthracite
D) Graphite
Answer: B) Lignite
Explanation: Lignite, also known as brown coal, has the lowest carbon content and produces less energy compared to other types of coal.
12. What is another name for petroleum?
A) Liquid coal
B) Rock oil
C) Natural fuel
D) Earth oil
Answer: B) Rock oil
Explanation: The word “petroleum” is derived from Latin, where “petra” means rock and “oleum” means oil, signifying its extraction from rock formations.
13. What harmful gas is released when fossil fuels are burned?
A) Oxygen
B) Carbon dioxide
C) Helium
D) Nitrogen
Answer: B) Carbon dioxide
Explanation: Burning fossil fuels releases carbon dioxide (CO₂), a greenhouse gas that contributes to global warming and climate change.
14. What is the process of extracting crude oil from underground reservoirs called?
A) Refining
B) Drilling
C) Mining
D) Fractional distillation
Answer: B) Drilling
Explanation: Crude oil is extracted from underground reservoirs through a process called drilling, which involves using rigs to reach oil deposits.
15. Which of the following is NOT a disadvantage of fossil fuels?
A) They are non-renewable
B) They cause pollution
C) They produce greenhouse gases
D) They are inexpensive and limitless
Answer: D) They are inexpensive and limitless
Explanation: Fossil fuels are non-renewable and depleting, making them neither limitless nor always inexpensive due to market fluctuations.
16. Which fuel is often used for cooking and heating in homes?
A) Diesel
B) Kerosene
C) Natural gas
D) Petrol
Answer: C) Natural gas
Explanation: Natural gas, primarily methane, is commonly used in homes for cooking and heating due to its efficiency and cleaner burning properties.
17. What is the full form of LPG?
A) Light Petroleum Gas
B) Liquefied Petroleum Gas
C) Liquid Petrol Gas
D) Lighter Petroleum Gas
Answer: B) Liquefied Petroleum Gas
Explanation: LPG stands for Liquefied Petroleum Gas, which is a mixture of propane and butane used for cooking and heating.
18. What is the chief component of coal?
A) Sulfur
B) Hydrogen
C) Carbon
D) Nitrogen
Answer: C) Carbon
Explanation: Coal is primarily composed of carbon, which makes it an efficient but polluting fuel when burned.
19. What is the byproduct of burning coal that causes acid rain?
A) Carbon monoxide
B) Sulfur dioxide
C) Methane
D) Hydrogen sulfide
Answer: B) Sulfur dioxide
Explanation: Sulfur dioxide (SO₂) is released when coal with high sulfur content is burned, leading to acid rain when it reacts with water in the atmosphere.
20. What is the process of refining petroleum called?
A) Combustion
B) Fractional distillation
C) Crystallization
D) Electrolysis
Answer: B) Fractional distillation
Explanation: Fractional distillation is the process used to separate different components of petroleum based on their boiling points.
21. Which of the following is NOT obtained from crude oil?
A) Petrol
B) Diesel
C) Natural gas
D) Kerosene
Answer: C) Natural gas
Explanation: Natural gas is a separate fossil fuel primarily composed of methane and is not derived from crude oil, unlike petrol, diesel, and kerosene, which are refined from crude oil.
22. What is the primary use of petroleum products?
A) Fertilizer production
B) Cooking
C) Fuel for transportation
D) Making paper
Answer: C) Fuel for transportation
Explanation: Petroleum products such as petrol and diesel are mainly used as fuel for transportation, including cars, buses, airplanes, and ships.
23. Which fossil fuel is considered the cleanest-burning?
A) Coal
B) Natural gas
C) Petroleum
D) Diesel
Answer: B) Natural gas
Explanation: Natural gas produces fewer pollutants and greenhouse gases compared to coal and petroleum when burned, making it the cleanest fossil fuel.
24. What is the main disadvantage of using fossil fuels?
A) They are expensive to extract
B) They are found only in deserts
C) They cause pollution and global warming
D) They never run out
Answer: C) They cause pollution and global warming
Explanation: The burning of fossil fuels releases carbon dioxide and other pollutants, leading to air pollution and climate change.
25. Which gas is released in large amounts when coal is burned in power plants?
A) Oxygen
B) Methane
C) Carbon dioxide
D) Nitrogen
Answer: C) Carbon dioxide
Explanation: Coal combustion releases large amounts of carbon dioxide (CO₂), a greenhouse gas that contributes to global warming.
26. What is the main use of diesel fuel?
A) Cooking
B) Powering trucks and buses
C) Making plastic
D) Producing fertilizers
Answer: B) Powering trucks and buses
Explanation: Diesel fuel is widely used in heavy vehicles such as trucks, buses, and trains because of its high energy efficiency.
27. What is the term for coal that is still in its soft, early stage of formation?
A) Anthracite
B) Lignite
C) Peat
D) Bituminous
Answer: C) Peat
Explanation: Peat is the earliest stage in the formation of coal and consists of partially decayed plant material found in wetlands.
28. Which country has the largest coal reserves?
A) China
B) India
C) Russia
D) United States
Answer: D) United States
Explanation: The United States has the largest coal reserves in the world, followed by Russia, Australia, and China.
29. What is another term for natural gas when used as a vehicle fuel?
A) Liquefied Petroleum Gas (LPG)
B) Compressed Natural Gas (CNG)
C) Refined Oil Gas (ROG)
D) Methane Liquid Gas (MLG)
Answer: B) Compressed Natural Gas (CNG)
Explanation: CNG is a form of natural gas stored under high pressure and used as an alternative fuel for vehicles because it is cleaner than petrol or diesel.
30. What are the two main products of burning fossil fuels?
A) Oxygen and water
B) Carbon dioxide and heat
C) Methane and nitrogen
D) Sulfur and hydrogen
Answer: B) Carbon dioxide and heat
Explanation: The combustion of fossil fuels releases carbon dioxide (CO₂) and heat energy, which is used for electricity generation, heating, and transportation.
31. Which fossil fuel is primarily used in power plants to generate electricity?
A) Petroleum
B) Coal
C) Diesel
D) Natural gas
Answer: B) Coal
Explanation: Coal is the most widely used fossil fuel for electricity generation in thermal power plants due to its abundance and affordability.
32. Which of these fossil fuels is used as jet fuel?
A) Diesel
B) Kerosene
C) Coal
D) Petrol
Answer: B) Kerosene
Explanation: Kerosene, specifically Jet A-1 fuel, is used in aircraft engines because of its high energy content and efficient combustion properties.
33. What is the biggest environmental problem caused by burning fossil fuels?
A) Earthquakes
B) Acid rain
C) Climate change
D) Floods
Answer: C) Climate change
Explanation: The burning of fossil fuels releases greenhouse gases, mainly carbon dioxide, which traps heat in the atmosphere, leading to global climate change.
34. Which fossil fuel is used to make asphalt for roads?
A) Bitumen
B) Methane
C) Propane
D) Peat
Answer: A) Bitumen
Explanation: Bitumen, a heavy residue from crude oil refining, is used to make asphalt for road construction.
35. Which energy source is known as “liquid gold”?
A) Natural gas
B) Crude oil
C) Coal
D) Diesel
Answer: B) Crude oil
Explanation: Crude oil is often referred to as “liquid gold” due to its economic value and extensive use in fuels and products.
36. Which gas is commonly found in coal mines and can be dangerous?
A) Oxygen
B) Carbon dioxide
C) Methane
D) Hydrogen
Answer: C) Methane
Explanation: Methane gas is highly flammable and can cause explosions in coal mines if not properly ventilated.
37. Which fossil fuel is used in making plastics?
A) Natural gas
B) Petroleum
C) Coal
D) Diesel
Answer: B) Petroleum
Explanation: Many plastics are derived from petroleum-based chemicals during the refining process.
38. What does the term “black gold” refer to?
A) Coal
B) Petroleum
C) Natural gas
D) Diesel
Answer: B) Petroleum
Explanation: Petroleum is sometimes called “black gold” because of its high value in the global economy.
39. What is the term for the process of extracting coal from the ground?
A) Refining
B) Mining
C) Drilling
D) Smelting
Answer: B) Mining
Explanation: Coal is extracted from the earth through mining, which can be surface mining or underground mining.
40. What is the main reason for switching from fossil fuels to renewable energy?
A) Fossil fuels are cheap
B) Renewable energy is expensive
C) Fossil fuels are non-renewable and polluting
D) Fossil fuels improve air quality
Answer: C) Fossil fuels are non-renewable and polluting
Explanation: The world is transitioning to renewable energy sources because fossil fuels are depleting and contribute to environmental problems like pollution and climate change.
41. Which fossil fuel is formed from the remains of marine organisms?
A) Coal
B) Petroleum
C) Peat
D) Anthracite
Answer: B) Petroleum
Explanation: Petroleum, or crude oil, is formed from the remains of marine organisms that were buried under layers of sediment and subjected to heat and pressure over millions of years.
42. What is the main reason coal is considered a non-renewable resource?
A) It is found only in limited places
B) It takes millions of years to form
C) It cannot be burned
D) It is expensive to mine
Answer: B) It takes millions of years to form
Explanation: Coal is considered non-renewable because it takes millions of years to form from decomposed plant material under high heat and pressure.
43. Which fossil fuel is commonly used in household gas cylinders?
A) Coal
B) Diesel
C) Liquefied Petroleum Gas (LPG)
D) Bitumen
Answer: C) Liquefied Petroleum Gas (LPG)
Explanation: LPG, a mixture of propane and butane, is commonly used in households for cooking and heating.
44. What is the major drawback of using fossil fuels for energy?
A) They are always expensive
B) They are available only in some countries
C) They cause environmental pollution
D) They produce too much energy
Answer: C) They cause environmental pollution
Explanation: The burning of fossil fuels releases harmful gases like carbon dioxide and sulfur dioxide, contributing to air pollution and climate change.
45. What is the main method used to extract crude oil from underground reservoirs?
A) Mining
B) Fracking
C) Drilling
D) Refining
Answer: C) Drilling
Explanation: Crude oil is extracted from underground reservoirs through drilling, a process that uses wells and pumps to bring oil to the surface.
46. Which fossil fuel is considered the most polluting?
A) Natural gas
B) Coal
C) Petrol
D) Diesel
Answer: B) Coal
Explanation: Coal releases the highest amount of carbon dioxide and other pollutants when burned, making it the most polluting fossil fuel.
47. Which fossil fuel is used to power most airplanes?
A) Petrol
B) Diesel
C) Kerosene
D) Natural gas
Answer: C) Kerosene
Explanation: Kerosene, specifically Jet A-1 fuel, is used in aircraft engines due to its high energy content and efficient burning properties.
48. Which of the following is NOT an effect of burning fossil fuels?
A) Air pollution
B) Global warming
C) Acid rain
D) Ozone layer repair
Answer: D) Ozone layer repair
Explanation: Burning fossil fuels damages the environment by causing air pollution, global warming, and acid rain, but it does not repair the ozone layer.
49. Which fossil fuel is a thick, black liquid found underground?
A) Coal
B) Natural gas
C) Petroleum
D) LPG
Answer: C) Petroleum
Explanation: Petroleum, also known as crude oil, is a thick, black liquid found underground that is refined into fuels like petrol, diesel, and jet fuel.
50. What is the primary greenhouse gas produced from burning fossil fuels?
A) Nitrogen
B) Carbon dioxide
C) Oxygen
D) Hydrogen
Answer: B) Carbon dioxide
Explanation: Carbon dioxide (CO₂) is the primary greenhouse gas released by burning fossil fuels, contributing to global warming.
51. Which fossil fuel is mainly used in power plants to generate electricity?
A) Natural gas
B) Petrol
C) Coal
D) Diesel
Answer: C) Coal
Explanation: Coal is the most commonly used fossil fuel for generating electricity in thermal power plants.
52. What does “fossil” in fossil fuels mean?
A) They are made from dead plants and animals
B) They are found in fossils
C) They come from volcanoes
D) They are found in deep seas
Answer: A) They are made from dead plants and animals
Explanation: Fossil fuels are called “fossil” fuels because they are formed from the remains of ancient plants and animals over millions of years.
53. Which of the following is NOT a fossil fuel?
A) Natural gas
B) Coal
C) Wind energy
D) Petroleum
Answer: C) Wind energy
Explanation: Wind energy is a renewable energy source, unlike coal, petroleum, and natural gas, which are fossil fuels.
54. What is the term for the process of extracting natural gas from shale rock?
A) Mining
B) Refining
C) Fracking
D) Drilling
Answer: C) Fracking
Explanation: Fracking, or hydraulic fracturing, is a method used to extract natural gas trapped in shale rock formations.
55. Which fossil fuel is commonly used to run cars and motorcycles?
A) Petrol
B) Natural gas
C) Coal
D) Bitumen
Answer: A) Petrol
Explanation: Petrol (gasoline) is the most common fuel used in cars and motorcycles.
56. What is the major disadvantage of coal mining?
A) It is very cheap
B) It improves soil quality
C) It damages the environment and human health
D) It helps in farming
Answer: C) It damages the environment and human health
Explanation: Coal mining destroys landscapes, pollutes water sources, and causes health issues such as lung diseases in miners.
57. What is the term for petroleum in its natural state before refining?
A) Diesel
B) Kerosene
C) Crude oil
D) LPG
Answer: C) Crude oil
Explanation: Crude oil is the unprocessed form of petroleum extracted from the earth before it is refined into useful fuels.
58. What is the major reason why fossil fuels are used despite their harmful effects?
A) They are very cheap and easy to use
B) They improve air quality
C) They never run out
D) They help forests grow
Answer: A) They are very cheap and easy to use
Explanation: Fossil fuels are widely used because they are currently more affordable and provide high energy output compared to many renewable sources.
59. Which fossil fuel is primarily composed of methane?
A) Coal
B) Petroleum
C) Natural gas
D) Diesel
Answer: C) Natural gas
Explanation: Natural gas is mainly composed of methane (CH₄), which is a clean-burning fuel used for heating and cooking.
60. Which type of coal is the hardest and has the highest carbon content?
A) Lignite
B) Bituminous
C) Anthracite
D) Peat
Answer: C) Anthracite
Explanation: Anthracite is the hardest form of coal with the highest carbon content and burns the cleanest among all coal types.
61. Which fossil fuel is known as the “dirtiest” due to its high carbon emissions?
A) Natural gas
B) Diesel
C) Coal
D) Petroleum
Answer: C) Coal
Explanation: Coal is considered the dirtiest fossil fuel because it emits the highest amount of carbon dioxide and pollutants when burned.
62. What is the primary reason fossil fuels are non-renewable?
A) They are expensive to extract
B) They take millions of years to form
C) They produce less energy
D) They are used in vehicles
Answer: B) They take millions of years to form
Explanation: Fossil fuels take millions of years to form from decomposed organic matter, making them a non-renewable resource.
63. What is the primary component of LPG?
A) Methane
B) Butane and propane
C) Coal dust
D) Hydrogen gas
Answer: B) Butane and propane
Explanation: Liquefied Petroleum Gas (LPG) consists mainly of butane and propane, which are used for cooking and heating.
64. Which of the following is NOT a byproduct of burning fossil fuels?
A) Water vapor
B) Carbon dioxide
C) Oxygen
D) Sulfur dioxide
Answer: C) Oxygen
Explanation: Burning fossil fuels consumes oxygen and releases pollutants like carbon dioxide and sulfur dioxide, but does not produce oxygen.
65. What is the main environmental effect of excessive carbon dioxide emissions?
A) Ozone layer depletion
B) Global warming
C) Earthquakes
D) Volcanic eruptions
Answer: B) Global warming
Explanation: Excessive carbon dioxide emissions trap heat in the atmosphere, leading to global warming and climate change.
66. What is the name of the process used to separate different petroleum products?
A) Drilling
B) Fractional distillation
C) Fracking
D) Extraction
Answer: B) Fractional distillation
Explanation: Fractional distillation separates petroleum into different products like petrol, diesel, and kerosene based on their boiling points.
67. Which of these fossil fuels releases the least carbon dioxide when burned?
A) Coal
B) Petroleum
C) Natural gas
D) Diesel
Answer: C) Natural gas
Explanation: Natural gas releases the least carbon dioxide compared to coal and petroleum, making it a cleaner-burning fuel.
68. What is another term for oil extracted from underground?
A) Bitumen
B) Crude oil
C) Kerosene
D) Tar
Answer: B) Crude oil
Explanation: Crude oil is the raw form of petroleum extracted from underground before refining.
69. What harmful gas released from burning coal causes acid rain?
A) Nitrogen gas
B) Sulfur dioxide
C) Oxygen
D) Helium
Answer: B) Sulfur dioxide
Explanation: Sulfur dioxide (SO₂) reacts with water in the atmosphere to form acid rain, which damages ecosystems and buildings.
70. What is the main disadvantage of extracting fossil fuels?
A) It improves air quality
B) It reduces land pollution
C) It destroys habitats and causes pollution
D) It increases oxygen levels
Answer: C) It destroys habitats and causes pollution
Explanation: Extracting fossil fuels through mining and drilling damages ecosystems, displaces wildlife, and causes pollution.
71. Which fuel is commonly used in power plants for electricity generation?
A) Petrol
B) Diesel
C) Coal
D) LPG
Answer: C) Coal
Explanation: Coal is the primary fuel used in thermal power plants to generate electricity.
72. What is the main reason for the global shift towards renewable energy?
A) Fossil fuels are free
B) Fossil fuels cause pollution and are non-renewable
C) Fossil fuels increase oxygen levels
D) Fossil fuels make soil fertile
Answer: B) Fossil fuels cause pollution and are non-renewable
Explanation: The world is moving towards renewable energy because fossil fuels cause pollution and will eventually run out.
73. Which country has the largest oil reserves?
A) United States
B) Saudi Arabia
C) China
D) India
Answer: B) Saudi Arabia
Explanation: Saudi Arabia has one of the largest proven oil reserves in the world and is a leading oil exporter.
74. What is the term for oil spills in oceans?
A) Oil pollution
B) Oil leakage
C) Oil disaster
D) Oil slick
Answer: D) Oil slick
Explanation: Oil slicks occur when petroleum spills into oceans, causing harm to marine life and ecosystems.
75. Which of these is NOT a use of petroleum?
A) Making plastics
B) Generating electricity
C) Making medicines
D) Growing crops directly
Answer: D) Growing crops directly
Explanation: While petroleum is used to make fertilizers, it is not directly involved in growing crops.
76. Which fossil fuel is commonly transported through pipelines?
A) Coal
B) Natural gas
C) Diesel
D) Kerosene
Answer: B) Natural gas
Explanation: Natural gas is transported through pipelines because it is a gaseous fuel.
77. Which of the following is NOT a disadvantage of fossil fuels?
A) Air pollution
B) Greenhouse gas emissions
C) Renewable resource
D) Limited availability
Answer: C) Renewable resource
Explanation: Fossil fuels are non-renewable, meaning they take millions of years to form and will eventually run out.
78. Which sector consumes the most fossil fuels?
A) Agriculture
B) Transportation
C) Education
D) Banking
Answer: B) Transportation
Explanation: The transportation sector uses the most fossil fuels, including petrol, diesel, and aviation fuel.
79. What is the primary reason coal mining is dangerous?
A) It is very cheap
B) It causes oxygen production
C) It leads to cave-ins and methane explosions
D) It improves air quality
Answer: C) It leads to cave-ins and methane explosions
Explanation: Coal mining is dangerous due to the risk of mine collapses, methane gas explosions, and lung diseases.
80. What is one way to reduce fossil fuel use?
A) Use more coal in power plants
B) Drive gasoline-powered cars more
C) Switch to renewable energy sources
D) Increase oil drilling
Answer: C) Switch to renewable energy sources
Explanation: Switching to renewable energy sources like solar and wind reduces dependence on fossil fuels.
81. What is the main reason oil spills are harmful to marine life?
A) They increase oxygen in water
B) They block sunlight and reduce oxygen levels
C) They provide food for fish
D) They make water cleaner
Answer: B) They block sunlight and reduce oxygen levels
Explanation: Oil spills form a layer on the water surface, blocking sunlight and reducing oxygen levels, which harms marine life.
82. Which of the following is NOT a form of fossil fuel?
A) Coal
B) Natural gas
C) Nuclear energy
D) Petroleum
Answer: C) Nuclear energy
Explanation: Nuclear energy is derived from radioactive materials like uranium, not from fossil fuels.
83. Which process is used to convert crude oil into usable fuels?
A) Evaporation
B) Fractional distillation
C) Filtration
D) Condensation
Answer: B) Fractional distillation
Explanation: Fractional distillation separates crude oil into different fuels based on their boiling points.
84. What is the main component of natural gas?
A) Carbon dioxide
B) Hydrogen
C) Methane
D) Oxygen
Answer: C) Methane
Explanation: Natural gas is primarily composed of methane (CH₄), a clean-burning fuel used for cooking and heating.
85. What is the term for converting coal into gas for energy use?
A) Gasification
B) Refining
C) Distillation
D) Smelting
Answer: A) Gasification
Explanation: Coal gasification is a process that converts coal into synthetic gas (syngas) for energy production.
86. What is the primary reason fossil fuels cause climate change?
A) They release carbon dioxide
B) They cool the Earth
C) They produce fresh air
D) They increase plant growth
Answer: A) They release carbon dioxide
Explanation: Burning fossil fuels releases carbon dioxide, a greenhouse gas that traps heat and leads to climate change.
87. Which of these fossil fuels is in a solid state?
A) Petroleum
B) Natural gas
C) Coal
D) LPG
Answer: C) Coal
Explanation: Coal is a solid fossil fuel formed from ancient plant material under heat and pressure.
88. Which of the following is a disadvantage of using coal?
A) It is non-renewable
B) It does not pollute the air
C) It does not emit carbon dioxide
D) It is made from water
Answer: A) It is non-renewable
Explanation: Coal is a non-renewable resource that takes millions of years to form and is not sustainable.
89. Which fossil fuel is often found along with crude oil deposits?
A) Bitumen
B) Natural gas
C) Graphite
D) Anthracite
Answer: B) Natural gas
Explanation: Natural gas is often found above crude oil deposits in underground reservoirs.
90. Why is coal mining dangerous for human health?
A) It causes increased oxygen levels
B) It leads to respiratory diseases
C) It improves lung function
D) It helps in weight loss
Answer: B) It leads to respiratory diseases
Explanation: Inhaling coal dust can cause lung diseases such as black lung disease (pneumoconiosis).
91. What is the main use of kerosene?
A) Fuel for jet engines and lamps
B) Used in making plastics
C) Used for construction
D) Used for purifying water
Answer: A) Fuel for jet engines and lamps
Explanation: Kerosene is commonly used as fuel for jet engines, lamps, and heating.
92. What is an alternative fuel that can replace petrol and diesel?
A) Natural gas
B) Sulfur dioxide
C) Carbon monoxide
D) Chlorine
Answer: A) Natural gas
Explanation: Natural gas is a cleaner alternative to petrol and diesel, producing fewer emissions.
93. Which fossil fuel is used in the production of fertilizers?
A) Coal
B) Petroleum
C) Natural gas
D) Diesel
Answer: C) Natural gas
Explanation: Natural gas is used to produce ammonia, a key ingredient in fertilizers.
94. What is the process of removing impurities from crude oil called?
A) Purification
B) Refining
C) Mining
D) Drilling
Answer: B) Refining
Explanation: Crude oil is refined to separate and remove impurities, producing fuels like petrol and diesel.
95. What happens when fossil fuels are burned?
A) They absorb carbon dioxide
B) They release greenhouse gases
C) They clean the air
D) They increase water supply
Answer: B) They release greenhouse gases
Explanation: Burning fossil fuels releases greenhouse gases like carbon dioxide, which contribute to global warming.
96. Which fossil fuel is commonly used in homes for heating and cooking?
A) Coal
B) Natural gas
C) Diesel
D) Bitumen
Answer: B) Natural gas
Explanation: Natural gas is used in homes for heating and cooking because it is clean and efficient.
97. What is the effect of acid rain caused by fossil fuel emissions?
A) It improves plant growth
B) It damages buildings and harms ecosystems
C) It increases oxygen levels
D) It makes water cleaner
Answer: B) It damages buildings and harms ecosystems
Explanation: Acid rain, caused by sulfur dioxide and nitrogen oxides from fossil fuels, damages buildings, plants, and aquatic life.
98. Which fossil fuel is used in making asphalt for roads?
A) Bitumen
B) Methane
C) Propane
D) Peat
Answer: A) Bitumen
Explanation: Bitumen, a thick residue from crude oil refining, is used in making asphalt for road construction.
99. What is the primary disadvantage of using petroleum-based fuels?
A) They are renewable
B) They reduce pollution
C) They contribute to air pollution and climate change
D) They produce oxygen
Answer: C) They contribute to air pollution and climate change
Explanation: Burning petroleum-based fuels releases pollutants and greenhouse gases, leading to air pollution and climate change.
100. What is the best way to reduce fossil fuel consumption?
A) Use more coal
B) Drive more petrol cars
C) Use renewable energy sources
D) Burn more oil
Answer: C) Use renewable energy sources
Explanation: Using renewable energy sources like solar, wind, and hydropower can reduce our dependence on fossil fuels and lower pollution.
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