Question

which fuel is used to fly a rocket

Answer 1

A rocket works by exchanging momentum. Both the mass of the propellant and the high velocity of its exit from the engine system give the rocket its momentum. The propellant attains its velocity by burning with an oxidizer in a high-pressure chamber. The resultant high energy exhaust is then funneled through a converging or diverging nozzle. This velocity, coupled with the right mass properties of the propellant, provides the power, or energy, required to get the vehicle into space.

Answer 2

Petroleum used as rocket fuel is a type of highly refined Kerosene.