Which of the following is the best fuel in terms of energy released pe

1.	Which of the following is the best fuel in terms of energy released per gram of fuel?
Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/hydrogen-22331" style="font-weight:bold;" target="_blank" title="Click to know more about HYDROGEN">HYDROGEN</a></p><br/><br/><p>The amount of energy <a href="https://interviewquestions.tuteehub.com/tag/released-613817" style="font-weight:bold;" target="_blank" title="Click to know more about RELEASED">RELEASED</a> increases with the number of bonds present in the <a href="https://interviewquestions.tuteehub.com/tag/chemical-914796" style="font-weight:bold;" target="_blank" title="Click to know more about CHEMICAL">CHEMICAL</a> <a href="https://interviewquestions.tuteehub.com/tag/substance-1231528" style="font-weight:bold;" target="_blank" title="Click to know more about SUBSTANCE">SUBSTANCE</a> or fuel. That is because each bond has a certain amount of energy stored in it therefore the more bonds the more energy is stored and more energy is released if these bonds <a href="https://interviewquestions.tuteehub.com/tag/break-903849" style="font-weight:bold;" target="_blank" title="Click to know more about BREAK">BREAK</a> through combustion. Theoretical values of energy released per gram of fuel (in joules/ gram) are: Hydrogen: 142.5 KJ/g; Methane: 55.6 KJ/ g; Ethanol: 29.7 KJ/g; Butane: 49.6KJ/g.</p></body></html>

Which of the following is the best fuel in terms of energy released per gram of fuel?