MCQ
Which of the following reactions of methane is incomplete combustion :
  • A
    $2\text{CH}_4+\text{O}_2\xrightarrow{\text{Cu/523K/100atm}}2\text{CH}_3\text{OH}$
  • B
    $\text{CH}_4+\text{O}_2\xrightarrow{\text{Mo}_2\text{O}_3}\text{HCHO}+\text{H}_2\text{O}$
  • $\text{CH}_4+\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ }\text{C(s)}+2\text{H}_2\text{O}(\text{l})$
  • D
    $\text{CH}_4+2\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{CO}_2\text{(g)}+2\text{H}_2\text{O}(\text{l})$

Answer

Correct option: C.
$\text{CH}_4+\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ }\text{C(s)}+2\text{H}_2\text{O}(\text{l})$
During incomplete combustion carbon black is formed. It takes place when there is insufficient supply of air or oxygen.
$\text{CH}_4+\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ }\text{C(s)}+2\text{H}_2\text{O}(\text{l})$

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