Which of the following could act as a propellant for rockets ?
Liq. H2 + Liq. O2
Liq. N2 + Liq. O2
Liq. H2 + Liq. N2
Liq. O2 + Liq. Ar
Liq. H2 because of low atomic mass and high enthalpy of combustion and Liq. O2 is strongly supported for combustion.