How was petroleum formed ? What is refining of petroleum ?
Petroleum is a fossil fuel which got formed by the dead remains of the sea animals. These animals slowly got trapped under soil and clay and more deposits were formed with time. Due to depth, the temperature and pressure raised and over the years they got converted into petroleum oil. Since oil is lighter than water, it did not get mix with water and got raised to the superficial rocks, which did not allow it to pass through them. To obtain petroleum, we have to dig wells to perforate the top rocks and pump up the petroleum oil.
The petroleum oil we get from these wells is a mixture of various other useful substances. Petroleum oil is, thus, refined to separate these useful by-products in petroleum refineries.
What are the advantages of using CNG and LPG as fuels?
Advantages of CNG—Compressfed Natural Gas and LPG—Liquefied Petroleum Gas are:
i) Both fuels burn with clean flame that does not produce smoke.
ii) They give more heat and energy as compared to other fuels.
Process of separation of different constituents from petroleum is called __________.
Describe how coal is formed from dead vegetation. What is this process called?
Millions of years ago, dense forest and animal got buried under the soil due to natural process like floods, earthquakes and thunder storms. When they got buried deep in the soil, they were exposed to very high pressure and temperature. Under these conditions, these slowly got converted into coal. This process of formation of coal vegetation is called carbonization.
Name the petroleum product used for surfacing of roads.
Bitumen or coaltar is used for surfacing of roads.
Fossil fuels are ________, ________ and ________.