Which of the following reactions is an example of use of water gas in the synthesis of other compounds ?
(a) \( \mathrm{CH}_{4}(g)+\mathrm{H}_{2} \mathrm{O}(g) \stackrel{1270 \mathrm{~K}}{\mathrm{Ni}} \mathrm{CO}(g)+\mathrm{H}_{2}(g) \)
\( \mathrm{P} \)
(b) \( \mathrm{CO}(\mathrm{g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \underset{\text { Catalyst }}{673 \mathrm{~K}} \mathrm{CO}_{2}(g)+\mathrm{H}_{2}(g) \)
W
(c) \( \mathrm{C}_{n} \mathrm{H}_{2 n+2}+n \mathrm{H}_{2} \mathrm{O}(g) \stackrel{1270 \mathrm{~K}}{\mathrm{Ni}} n \mathrm{CO}+(2 n+1) \mathrm{H}_{2} \)
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