Which alkane is known as marsh gas?

  1. Methane
  2. Ethane
  3. Propane
  4. Butane

Answer (Detailed Solution Below)

Option 1 : Methane
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Methane is the lightest hydrocarbon having one carbon and four hydrogen atoms. Its molecular weight is 16. It is also a fuel gas commonly called marsh gas because it is produced from marshy lands. Some facts about it: 

  • Methane is produced when vegetation decomposes naturally within some geographical marshes, swamps.
  • The main process behind the production of methane is anaerobic digestion.
  • Biogas or Gobar gas also contains 60-70% of methane. 
  • Methane is one of the greenhouse gases. Other greenhouse gases are- carbon dioxide, water vapour, nitrous oxide and ozone.
  • Methane is produced in the soil during microbial decomposition of organic matter and reduction of CO2 under strictly anaerobic conditions. 

Hence, we conclude that Methane is known as Marsh gas.

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