Question

Which of the following is not formed by the reaction of $C{l}_2$ on $C{H}_4$ in sunlight :

• A. $CHC{l}_3$
• B. $C{H}_{3}Cl$
• C. $C{H}_{3}C{H}_3$
• D. $C{H}_{3}C{H}_{2}C{H}_3$

Answer 1

The correct option is D $C{H}_{3}C{H}_{2}C{H}_3$

$C{H}_4\stackrel{C{l}_2}{\to }C{H}_{3}Cl\stackrel{C{l}_2}{\to }C{H}_{2}C{l}_2\stackrel{C{l}_2}{\to }CHC{l}_3\stackrel{C{l}_2}{\to }CC{l}_4$. Since this reaction takes place by free radical mechanism. Hence, there is a possibility of formation of ethane. not propane.
$C{H}_3+C{H}_3\to C{H}_3-C{H}_3$
Methyl free radicals Ethane