Out of the following, which possess highest calorific value?

Cow dung cake Kerosene LPG Hydrogen

Hydrogen

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