Highest fuel value , heating value of a fuel , सबसे अधिक ईंधन मूल्य ,Hydrogen fuel

Which one of the following has the highest fuel value?

निम्न में से किसका ईंधन मूल्य सबसे अधिक है?
□ Hydrogen(हाइड्रोजन)
□ Charcoal(लकड़ी का कोयला)
□  Natural gas(प्राकृतिक गैस)
□ Gasoline(पेट्रोल)

Correct Option : Hydrogen(हाइड्रोजन)

The heating value of a fuel is the amount of heat that is obtained after one gram (1gm) of fuel is burnt completely in air or oxygen. Hydrogen has the highest heating value among all fuels.
Hydrogen is used as a rocket fuel and in burner producing high temperature.  
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