McqMate
| Q. |
Which one of the following is not a constituent of biogas? |
| A. | Methane |
| B. | Carbon dioxide |
| C. | Hydrogen |
| D. | Nitrogen dioxide |
| Answer» D. Nitrogen dioxide | |
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Explanation: Nitrogen dioxide is not a component of biogas. Biogas is produced under anaerobic conditions; the process is denominated as anaerobic digestion. The major constituent of biogas is methane (55-70%), CO2 (30-45%) and some traces of gases such as H2S and ammonia. |
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