Multiple choice general knowledge science & technology

Which of these has the highest calorific value?

  1. Rubber

  2. Wood

  3. Coal

  4. Hydrogen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydrogen has the highest calorific value (about 141,790 kJ/kg) among the options. Coal (~24,000-30,000 kJ/kg), wood (~15,000-19,000 kJ/kg), and rubber have much lower calorific values. Hydrogen's high energy content per unit mass makes it the fuel with the greatest heating value.

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