EASY
Q: What is the primary purpose of fuels?
A: To produce energy.
Q: Why are fossil fuels considered non-renewable?
A: Because they take millions of years to form and cannot be replaced once used.
What are the three main types of fuels?
Solid fuels, liquid fuels, and gaseous fuels.
Q: Name one example of a solid fuel.
A: Coal, wood, or charcoal.
Q: Name one gaseous fuel that is considered an eco-friendly alternative to petrol and diesel in vehicles.
A: CNG (Compressed Natural Gas).
Which fuel is most commonly used in homes for cooking and heating, and what is one major drawback of its use?
Solid fuels (such as coal, wood, and charcoal) are commonly used in homes. One major drawback is that coal releases pollutants like sulfur dioxide and carbon dioxide when burned.
Q: Which fuel is commonly used in homes for cooking?
A: LPG (Liquefied Petroleum Gas).
Q: Which type of fuel—solid, liquid, or gaseous—is the most efficient and cleanest to burn?
A: Gaseous fuels.
Why is LPG considered a cleaner alternative compared to coal and diesel fuels?
LPG is considered cleaner because it produces fewer harmful emissions, such as sulfur dioxide and carbon dioxide, compared to coal and diesel
Q: What are the three main types of fuels?
A: Solid, liquid, and gaseous fuels.
Q: Why is biogas considered a renewable fuel?
A: It is produced from organic waste like animal dung and plant material, which can be replenished.
Explain how the combustion of petrol and diesel fuels contributes to environmental pollution.
The combustion of petrol and diesel fuels releases greenhouse gases like carbon dioxide and other pollutants such as nitrogen oxides and particulate matter, which contribute to global warming and air pollution.
Q: Name one liquid fuel used in vehicles.
A: Petrol or diesel.
Q: What are two factors to consider when selecting a fuel for use?
A: Availability, cost, efficiency, environmental impact, and safety (any two).
Discuss the environmental benefits of using biogas as a fuel and how it is produced.
Biogas is an eco-friendly fuel because it is produced from organic waste, such as agricultural residues and animal manure, reducing waste and providing renewable energy. Its use promotes sustainable energy practices and reduces reliance on fossil fuels, leading to lower greenhouse gas emissions.