Coal and Petroleum Chapter 5 Science Class 8

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 NCERT
CLASS 8 
CHAPTER :- 5

COAL AND PETROLEUM

KEYWORDS SOLUTIONS


















KEYWORDS



📔COAL :- A black or dark-brown combustible substance formed by carbonation of vegetable matter, used as a fuel.





📔COAL GAS :- Coal gas is obtained during the processing of coal to get Coke . It is mainly used as a fuel in industries around coal processing plant.






📔COAL TAR :- Coal Tar is a black, thick Viscous liquid and a mixture of almost hundreds of chemical compounds.





📔COKE :- A synthetic fuel, obtained from destructive distillation of coal.






📔 FOSSIL FUELS :- Fuel formed from the dead remains of living organisms millions of year ago.






📔 NATURAL GAS :- Natural gas is one of the most useful, Clean and safe energy sources . When natural gas burns, it gives off a large amount of energy, and unlike other Fossil fuels, leaves no ash.






📔 PETROLEUM :- Petroleum oily , thick , flammable liquid , a mixture of various hydrocarbon formed from dead remains of living organisms.






📔 PETROLEUM REFINERY :- A place where petroleum is refined is called Petroleum refinery.
















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