1. Explore the composition of coal and petroleum. Which type of coal is used in thermal power
plants?
2. Why is LPG considered a better fuel than coal for cooking purposes? (Hint: Think about smoke.)
3. Why is LPG filled in cylinders under pressure?
4. What is biogas? Is it a fossil fuel?
5. Planting of trees helps in checking global warming. How?
Answers
Explanation:
1. Petroleum is a mixture of hydrocarbons (containing C and H). There are mainly three classifications of coal: Anthracite, Bituminous and Lignite. Lignite has the lowest grade of coal whereas anthracite is the highest one.Power plants generally use steamcoal which is a grade between anthracite and bituminous.
2.LPG is considered as a better fuel than coal as it is more eco-friendlythan coal. Burning of coal releases many toxic gases which affects our health. But on the other hand LPGdoes not have any such nuisance.
3.LPG is liquefied petroleum gas (usually butane or propane) filled in cylinders under pressure so that the gas remains in liquid state. ... When the valve is opened thepressure inside the cylinderdecreases and the liquid changes into gas which we use to cook food.
4.Fossil fuels are ultimately a hydrocarbon fuel and as hydrocarbon fuel they come in many different forms after purified, or refined. Biogas is also a hydrocarbon fuel, but generally speaking biogas is not a fossil fuelbecause it was not mined and captured from a geological deposit.
5.Yes planting trees helps in keeping global warmingunder check as trees reduce the amount of carbon dioxide under control by absorbing it and giving out oxygen. Carbon dioxide is a green house gas and trees can keep its amount under control.
Answer:
Explanation:
It was erythrocytes coal. 1
3 So that we can use it in gaseous form (otherwise it has liquid form)
2. Coal produce harmful gases (smoke) but LPG doesn't
4. Gas produce of biodegradable wastes(ex meten) called bio gas
It is not fossil fuels
5. Lichen is type of plant measures global warming
This is used by scientist to measure global warming