Question

Which of the following is not formed by the reaction of $Cl_{2}$ on $CH_{4}$ in sunlight.

• A. $CHCl_{3}$
• B. $CH_{3}Cl$
• C. $CH_{3}CH_{3}$
• D. $CH_{3}CH_{2}CH_{3}$

Answer 1

Answer: (D)

$CH_{3}CH_{2}CH_{3}$

Answer 2

$CH_{4}\overset{\quad Cl_{2}\quad}{\rightarrow}CH_{3}Cl\overset{\quad Cl_{2}\quad}{\rightarrow}CH_{2}Cl_{2}\overset{\quad Cl_{2}\quad}{\rightarrow}$

$CHCl_{3}\overset{\quad Cl_{2}\quad}{\rightarrow}CCl_{4}$. Since this reaction takes place by free radical mechanism. Hence, there is a possibility of formation of ethane.

$\underset{\text{Methyl free radicals}}{\overset{.}{C} ⥂ H_{3} + \overset{.}{C} ⥂ H_{3}} \rightarrow \underset{\text{Ethane}}{CH_{3} - CH_{3}}$