HOTS ( Higher order thinking skills)
1. Why do we not use coal gas as a Cooking fuel?
2. Why does petroleum float on water ?
3. Why do different types of coal have different composition?
4. Can we prepare coal and petroleum in laboratory?
5. Suggest some methods to reduce the LPG consumption at home ?
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Answers
Answer:
1)we use coal gas as a cooking school because it is highly durable and it helps to cook things very nicely
2)petroleum floats on water because it is a kind of oil only and oils only float on water because their weight is generally lighter than that of water so that's why it comes and floats on the top of water
3)different types of composition because everyone has different characteristic
4) no we can't prepare coal and petroleum in laboratory because it is only found in ores and ores are found deep in the earth"s surface
Explanation:
1. Well, coal is a natural resource. This is because we get coal from dead plants and animals buried in the Earth's crust millions of years ago. Fossil fuels take a lot of time for their formation. ... This is the reason why we do not use coal as a cooking fuel.
2. As the oil and gas are generated, depending on local conditions, the petroleum products will separate by density. Oil is less dense than water so it will "float" on water. Gas is less dense than both and will float to the top.
3.Different types of coal have different composition as it has to do with the process of coalification. The degree of change a coal underwent as it matured from peat to anthracite can be termed as coalification. ... On this basis,we have different ranks of coal-peat,lignite,bituminous and anthracite.
4.No, their formation is a very slow process and conditions for their formation cannot be reached in the laboratory.
5. Methods to reduce lpg consumption at home:
Use pressure cooker for cooking.
Prefer to use vessels with lid.
Avoid phone calls during cooking.
According to burner size, use proper vessel.
Reheating of food should be avoided.
Add sufficient amount of water to food.
Switch off the regulator after the usage