What is the correct sequence of various components of biogas in terms of their abundance?

(A) Ammonia (NH3)

(B) Hydrogen Sulfide (H2S)

(C) Methane (CH4)

(D) Carbon dioxide (CO2)

Choose the correct answer from the options given below : 

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UGC NET Paper 1: Held on 14th Oct 2022 Shift 1
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  1. B > D > A > C 
  2. C > D > A > B
  3. D > C > B > A
  4. C > D > B > A

Answer (Detailed Solution Below)

Option 4 : C > D > B > A
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UGC NET Paper 1: Held on 21st August 2024 Shift 1
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50 Questions 100 Marks 60 Mins

Detailed Solution

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The correct answer is C > D > B > A.

Key Points

  • Biogas is a renewable fuel created when organic material like food scraps and animal manure decomposes. 
  • It is created during a process known as anaerobic digestion in which microbes break down organic matter such as food or animal manure without the presence of oxygen.
  • The waste material must be contained in an environment with no oxygen for this to happen.
  • The components of biogas in terms of their abundance are mentioned below with their respective percentages. 
    • Methane (50-85%)
    • Carbon dioxide (5-50%)
    • Water vapor (0-10%)
    • Hydrogen (0-1%)
    • Hydrogen sulphide (0-3%)
    • Nitrogen (0-5%)

Thus, the correct sequence of various components of biogas in terms of their abundance is Methane (CH4) ⇒ Carbon dioxide (CO2) ⇒ Hydrogen Sulfide (H2S) ⇒ Ammonia (NH3). 

Additional Information

  • In place of coal or natural gas, stored biogas can offer a safe, dependable, and sustainable source of baseload electricity.
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