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:
- A1 and 2
- B3 and 4
- C2 and 3
- D1 and 3
Show answer and explanation
Correct answer: (d) 1 and 3
Explanation
Biogas is produced by anaerobic digestion of organic waste; its two major constituents are methane (CH₄, ~50-70%) and carbon dioxide (CO₂, ~30-50%).
Butane and carbon monoxide are not significant components (only traces of H₂S, water vapour, N₂ occur).