Which reagent will you use for the following reaction ?
`CH_(3)CH_(2)CH_(2)CH_(3)toCH_(3)CH_(2)CH_(2)CH_(2)Cl+CH_(3)CH_(2)CHClCH_(3)`

Options

A. `Cl_(2)//UV` light
B. `NaCl+H_(2)SO_(4)`
C. `Cl_(2)` gas in dark
D. `Cl_(2)` gas in the presence of iron in dark

Answer

A

Explanation

The given reaction is a substitution reaction. It involves the replacement of `1^(@)` and `2^(@)` hydrogen of alkanes by chlorine. it occurs in presence of ultraviolet light or at high temperature.
The chlorination does not occur at room temperature in absence cf light. In this reaction, light is absorbed by the chlorine molecule and activated chlorine initiates the reaction as follows

So, option (a) is the correct