Which of the following reactions of methane is incomplete combustion:

Options

A. `2CH_(4) + O_(2) overset(Cu//523 K// 100 atm)rarr 2CH_(3)OH`
B. `CH_(4) + O_(2) overset(Mo_2O_3) rarr HCHO + H_2O`
C. `CH_(4) + O_(2) rarr C(s) + 2H_(2) O(I)`
D. `CH_(2) + 2O_(2) rarr CO_(2) (g) + 2H_(2) O(I)`

Answer

C

Explanation

During incomplete combustion of alkanes with insufficient amount of air or dioxygen carbon black is formed which is used in the manufacture of ink, printer ink, black pigments and as filters. Thus,
`CH_(4)(g)+O_(2)(g) overset("Incompleter")underset("combustion")rarrC(s) + 2H_2O(I)`.