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Question

Which of the following reactions of methane is incomplete combustion?


A
2CH4+O2Cu/523K/100atm−−−−−−−−−−2CH3OH
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B
CH4+O2Mo2O3−−−HCHO+H2O
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C
CH4+O2C(s)+2H2O(l)
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D
CH4+2O2CO2(g)+2H2O(l)
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Solution

The correct option is D $$CH_4 + O_2 \rightarrow C_{(s)} + 2H_2O{(l)}$$
In complete combustion, Methane releases $$C{O}_{2} \; and \; {H}_{2}O$$. Hence, the reaction  $$C{H}_{4} + {O}_{2} \longrightarrow {C}_{(s)} + 2{{H}_{2}O}_{(l)}$$ shows incomplete combustion.

Chemistry

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