Multiple choice

Bio-gas is better than the animal dungcakes as a fuel because _____________.

  1. it has higher calorific value

  2. it is easily available

  3. it burns easily

  4. it does not burn completely
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biogas has a higher calorific value (approximately 35-40 MJ/m³) compared to dung cakes (approximately 10-15 MJ/kg). This means biogas produces more heat per unit mass, making it more efficient as a fuel. The other options either don't explain why it's better (availability, ease of burning) or state the opposite (incomplete combustion).

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