Question

In which of the following, homolytic bond fission takes place ?

• A. Alkaline hydrolysis of ethyl chloride
• B. Addition of HBr to double bond
• C. Free radical chlorination of methane
• D. Nitration of Benzene

Answer 1

Answer: (C)

Free radical chlorination of methane

Answer 2

Free radical chlorination of methane Initiation (1) $Cl_2 {->[\text{Light}]} 2Cl^{\bullet}$ Propagation (2) $Cl + CH_4 \rightarrow HCl + \overset{\bullet}{C}H_3$ (3)$CH_3 + Cl_2 \rightarrow CH_3Cl + Cl^{\bullet}$ Termination (4) $2Cl^{\bullet} \rightarrow Cl_2$ $Cl \bullet + \bullet CH_3 \rightarrow CH_3Cl$ $2. CH_3 \rightarrow CH_3CH_3$