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Q99 (UPPCS/2025) Science & Technology › New Materials, Energy & Environment-linked Tech

Which of the following two are the major constituent of Bio-gas ?
1. Methane
2. Butane
3. Carbon dioxide
4. Carbon monoxide
Select the correct answer from the code given below :
Code :

Result
Your answer: —  Â·  Correct: C

Explanation

Bio-gas is a renewable fuel produced through the anaerobic digestion (breakdown in the absence of oxygen) of organic matter such as agricultural waste, animal manure, and food scraps. The composition of bio-gas typically includes:

  • Methane (CH4): The primary combustible component, making up about 50% to 75% of the volume.
  • Carbon dioxide (CO2): The second major component, making up about 25% to 50% of the volume.

Small amounts of other gases like Nitrogen (N2), Hydrogen (H2), and Hydrogen sulfide (H2S) may also be present. Butane is a major constituent of Liquefied Petroleum Gas (LPG), while Carbon monoxide is typically a byproduct of incomplete combustion and is not a major constituent of bio-gas produced during anaerobic digestion.

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