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Question
Tick true/false against the following statements.
(a) Fossil fuels can be made in the laboratory.
(b) CNG is a more polluting fuel than petrol.
(c) Coke is an almost pure form of carbon.
(d) Coal tar is a mixture of various substances.
(e) Kerosene is not a fossil fuel.
A.
All true
B.
All false
C.
(a), (b), (c) are false & (d), (e) are true
D.
(a), (b), (e) are false & (c), (d) are true
Answer ( Option D)

(a), (b), (e) are false & (c), (d) are true

Solution

Fossil Fuels:
  • Fossil fuels are formed by natural processes such as the anaerobic decomposition of buried organisms under heat and pressure.
  • Fossil fuels like coal, petroleum, natural gas contain high percentages of carbon.
  • Fossil fuels are non-renewable resources and must be burned to release their energy.
  • It releases sulphur, nitrogen, carbon, etc. gases into the atmosphere which causes the greenhouse
    effect and pollution.
Fuel: 
  • The sources of energy for domestic and industrial purposes are mainly wood, charcoal, petrol, kerosene, etc. 
  • These substances are called fuels.
  • A good fuel is one that is readily available, cheap, burns easily in the air at a moderate rate, and produces a large amount of heat.
  • Petroleum is extracted from crude oil.
  • With the help of fractional distillation of crude oil, not just petroleum but also a large number of by-products are extracted.
  • Byproducts of petroleum are Paraffin wax, Bitumen, Lubricating oil, etc.
  • Like Petroleum, gasoline, Naptha, paraffin, Diesel, Fuel oil, Lubricating oils, Bitumen, and some solid carbons.

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