Question

Dihydrogen is considered as a very good fuel because

Answer 1

H2 is considered a good fuel because it burns efficiently without leaving any residue like any other would do . After combustion only product is water which can be used in many ways . moreover the enthalpy of combustion is very high .

Answer 2

Hydrogen is considered an alternative fuel. It is due to its ability to power fuel cells in zero-emission electric vehicles, its potential for domestic production, and the fuel cell's  potential for high efficiency. In fact, a fuel cell coupled with an electric motor is two to three times more efficient than an internal combustion engine running on gasoline.