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Among the following fuels, which one has the HIGHEST calorific value?
AHydrogen
BLPG
CCoal
DWood
Answer & Solution
Correct answer: A. Hydrogen
From the calorific-value table in the chapter: wood ≈ 17–22 kJ/g, coal ≈ 25–33 kJ/g, LPG ≈ 55 kJ/g, hydrogen ≈ 150 kJ/g. Hydrogen has by far the highest calorific value of any common fuel.
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