Which of the following reactions of methane is incomplete combustion:

(i)2CH_{4}+O_{2}\xrightarrow[Cu/523]{K/100atm}2CH_{3}OH

(ii)CH_{4}+O_{2}\overset{Mo_{2}O_{3}}{\rightarrow}HCHO+H_{2}O

(iii)CH_{4}+O_{2}\rightarrow C(s)+2H_{2}O(l)

(iv)CH_{4}+2O_{2}\rightarrow CO_{2}(g)+2H_{2}O(l)

Answers (1)

The answer is the option (iii)CH_{4}+O_{2}\rightarrow C(s)+2H_{2}O(l)

Explanation: Insufficient supply of air or oxygen leads to incomplete combustion and carbon black is formed.

Hence, CH_{4}+O_{2}\rightarrow C(s)+2H_{2}O(l)

 

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