Multiple choice general knowledge science & technology

Biogas is a methane-rich gas formed by fermentation of animal dung, human sewage and crop residue. The advantage(s) of biogas is/are:

  1. A clean and smokeless fuel

  2. Slurry left behind is used as fish feed

  3. High potential in rural India

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biogas offers multiple advantages: it burns cleanly without smoke (A), the fermented slurry is rich in nutrients and can be used as fish feed or fertilizer (B), and it has high potential in rural India where raw materials are readily available (C). Since all three statements are correct, 'All of the above' is the right choice.

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