... hydrogen gas at same temperature and pressure(H=1.0 and C=12)
The question is ambiguous.
"Nitrogen tetroxide" redirects here. For NO4, see Nitrosylazide and Oxatetrazole.
Dinitrogen tetroxide, commonly referred to as nitrogen tetroxide, is the chemical compound N2O4. It is a useful reagent in chemical synthesis. It forms an equilibrium mixture with nitrogen dioxide.