Which of the following is used as rocket fuel?

Hydrogen is the most suitable to use as a rocket fuel because-

• It has the highest calorific value which is 150KJ/Kg.
• It is a powerful rocket propellant, as it has the lowest molecular weight and it burns with extreme intensity.
• It can be stored in large quantities in small spaces because it is very lightweight.
• It provides the highest push per unit of mass compared to any other chemical rocket.
• The product of the combustion of hydrogen with oxygen is only water, so it is pollution-free.