Multiple choice general knowledge science & technology

Which of these has the highest calorific value?

  1. Rubber

  2. Coal

  3. Hydrogen

  4. Wood

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hydrogen has the highest calorific value at about 141 MJ/kg, far exceeding coal (24-35 MJ/kg) and wood (15-20 MJ/kg). Rubber's calorific value is around 40 MJ/kg, still significantly below hydrogen. The high energy density makes hydrogen an excellent fuel despite storage challenges.

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