Multiple choice

Which of the following fuels has least calorific value?

  1. Cow dung cake

  2. Petrol

  3. L.P.G

  4. Hydrogen
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A Correct answer
Explanation

Cow dung cakes have the lowest calorific value (approximately 2000-2500 kCal/kg) among the given options, as they contain high moisture and ash content. In comparison, petrol has ~11000 kCal/kg, LPG ~12000 kCal/kg, and hydrogen has the highest at ~34000 kCal/kg.

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