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NCERT Class 8 Science Chapter 5: Coal and Petroleum | NSO | NSTSE | Olympiad
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Coal
Black
Hard as stone
As fuel – cook, steam engine, electricity
Carbonisation
Petroleum
Dark oily liquid
Unpleasant odour
Mixture of various constituents such as petroleum gas, petrol, diesel, lubricating oil, paraffin wax
Natural Gas
Easy to transport in pipes
Stored under high pressure as CNG
CNG for power generation
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