Hydrogen And Its Compounds

$2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{l})} \xrightarrow{\text { electrolysis }} 2 \mathrm{H}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g})$

$\mathrm{CH}_{4(\mathrm{~g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \xrightarrow{\mathrm{Ni}} \mathrm{CO}_{(\mathrm{g})}+3 \mathrm{H}_{2(\mathrm{~g})}$

$\mathrm{C}_{(\mathrm{s})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \longrightarrow \mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_{2(\mathrm{~g})}$

$\quad \mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \xrightarrow[\text { Iron chromate }]{673 \mathrm{~K}} \mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})}$