The equation that represents the water-gas shift reaction is :
Correct Option: 1
(1) Water gas shift reaction
$\mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_{2} \mathrm{O}_{(\mathrm{g})} \frac{673 \mathrm{~K}}{\text { catalyst }} \mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})}$
(2) Water gas is produced by this reaction.
$\mathrm{CH}_{4(\mathrm{~g})}+\mathrm{H}_{2} \mathrm{O}_{(\mathrm{g})} \stackrel{1270 \mathrm{~K}}{\mathrm{Ni}} \mathrm{CO}_{(\mathrm{g})}+3 \mathrm{H}_{2(\mathrm{~g})}$
(3) Water gas is produced by this reaction
$\mathrm{C}_{(\mathrm{s})}+\mathrm{H}_{2} \mathrm{O}_{(\mathrm{g})} \stackrel{1270 \mathrm{~K}}{\longrightarrow} \mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_{2(\mathrm{~g})}$
(4) producer gas is produced by this reaction.
$2 \mathrm{C}_{(\mathrm{s})}+\mathrm{O}_{2(\mathrm{~g})}+4 \mathrm{~N}_{2(\mathrm{~g})} \stackrel{1270 \mathrm{~K}}{\longrightarrow} 2 \mathrm{CO}_{(\mathrm{g})}+4 \mathrm{~N}_{2(\mathrm{~g})}$
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