Question

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Which of the following reactions of methane is incomplete combustion?

ChemistryHydrocarbons

Options:

A
$2 \mathrm{CH}_4+\mathrm{O}_2 \stackrel{\mathrm{Cu} / 523 \mathrm{~K} / 100 \mathrm{~atm}}{\longrightarrow} 2 \mathrm{CH}_3 \mathrm{OH}$
B
$\mathrm{CH}_4+\mathrm{O}_2 \stackrel{\mathrm{Mo}_2 \mathrm{O}_3}{\longrightarrow} \mathrm{HCHO}+\mathrm{H}_2 \mathrm{O}$
C
$\mathrm{CH}_4+\mathrm{O}_2 \longrightarrow \mathrm{C}(s)+2 \mathrm{H}_2 \mathrm{O}(l)$
D
$\mathrm{CH}_4+2 \mathrm{O}_2 \longrightarrow \mathrm{CO}_2(\mathrm{~g})+2 \mathrm{H}_2 \mathrm{O}(l)$