Question

Which reagent will you use for the following reaction?

$C{H}_{3}C{H}_{2}C{H}_{2}C{H}_3\to C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}Cl+C{H}_{3}C{H}_{2}CHClC{H}_3$

• A. $C{l}_2$ gas in the presence of iron in dark
• B. $C{l}_2/UV\text{light}$
• C. $C{l}_2\text{gas in dark}$
• D. $NaCl+H_{2}S{O}_4$

Answer 1

The correct option is B $C{l}_2/UV\text{light}$

$\text{Substitution reaction}:$

The given reaction is a substitution reaction. It involves the replacement of a $1^{\circ }$ and $2^{\circ }$ hydrogen of alkanes by chlorine. It occurs in the presence of ultraviolet light or at high temperature.
The chlorination does not occur at room temperature or in absence of light.

$\text{Mechanism of given reaction}:$






Similar mechanism for $2^{\circ }$ radical.

Therefore, correct option is $\left(A\right)$.