Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms,
containing energy originating in ancient photosynthesis. The age of the organisms and their resulting fossil fuels
is typically millions of years, and sometimes exceeds 650 million years.Fossil fuels contain high percentages
of carbon and include petroleum, coal, and natural gas. Other commonly used derivatives
include kerosene and propane. Fossil fuels range from volatile materials with low carbon to hydrogen ratios
like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon,
like anthracite coal. Methane can be found in hydrocarbon fields either alone, associated with oil, or in the form
of methane clathrates.
16. The compound which is present in producer gas
(A) Methane
(B) Propane
(C) Nitrogen
(D) None of the above
17. Which of the following is a natural gas
(A) Methane
(B) Ethylene
(C) Propylene
(D) Butane
18. Calorific value of Anthracite in Kcal/kg is
(A) 4000
(B) 8000
(C) 2600
(D) 2800
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Answer:
16.Methane
17.butane
18.7,600 - 7,800 kcal/kg
Explanation:
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