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प्रश्न
Explain the process of formation of petroleum.
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उत्तर
Petroleum was formed from organisms living in the sea. As these organisms died, their bodies settled at the bottom of the sea and became covered with layers of sand and clay. Over millions of years, the absence of air, high temperature, and high pressure transformed the dead organisms into petroleum and natural gas.
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संबंधित प्रश्न
Fill in the following blanks with suitable words :
LPG is a ........... fuel but biogas is not a..........fuel.
Which of the following is not a natural resource?
(a) soil
(b) water
(c) electricity
(d) natural gas
Which of the following combination of terms has no fossil fuel?
(a) wind, ocean, coke
(b) kerosene, tide, wind
(c) wood, wind, sun
(d) petrol, wood, sun
A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking.
(a) Name the device X.
(b) What is the source of energy which cooks food in this device?
(c) What is the name of the process which traps energy in this device?
(d) State one advantage (other than saving on fuel) or using such a device for cooking food.
While discussing about coal and petroleum a teacher told his students about PCRA's (Petroleum Conservation Research Association) guidelines to save the fossil fuels while driving vehicles. Deepa was going to her school with her mother who was driving car. At the traffic signal, when the light was red, Deepa suggested her mother to switch of the engine.
After reading the above passage, answer the following questions :
(a) Fossil fuels are natural resources, then why do we need to conserve them?
(b) List any two ways of saving the fossil fuels.
(c) State two values exhibited to Deepa.
Write two disadvantages of burning fossil fuels.
Write an answer to the following question in your own words.
Make a list of the components we obtain from mineral oil.
Match the following.
| Octane rating | Diesel |
| Cetane rating | Methane |
| Simplest hydrocarbon | Petrol |
| Peat | Bown in colour |
| Lignite | First stage coal |
Write some important uses of the various constituents of petroleum.
Crude oil is used as a sealant for waterproofing various surfaces.
