Out of the following, which possess highest calorific value?
Answer & explanation
Correct answer: option 4
The correct answer is option 4. Hydrogen.
The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its calorific value.
Its unit is kilojoules per kilogram (kJ/kg).
| Fuel | Calorific Value (kJ/kg) |
| Cow dung cake | 6000-8000 |
| Wood | 17000-22000 |
| Coal | 25000-33000 |
| Petrol | 45000 |
| Kerosene | 45000 |
| Diesel | 45000 |
| Methane | 50000 |
| CNG | 50000 |
| LPG | 55000 |
| Biogas | 35000-40000 |
| Hydrogen | 150000 |