Question

Which of the following is a termination step in halogenation?

• A. $Cl - Cl \xrightarrow{hv}\overset{\bullet}{C}l + \overset{\bullet}{C}l$
• B. $CH_4 + Cl \xrightarrow{hv}\overset{\bullet}{C}H_3 + HCl$
• C. $CH_3Cl + \overset{\bullet}{C}l \longrightarrow \overset{\bullet}{C}H_2Cl + HCl$
• D. $H _{3} \overset{\bullet}{C} + \overset{\bullet}{C}l \longrightarrow CH _{3} Cl$

Answer 1

Answer: (D)

Reaction (d) is a termination step in halogenation. This step stops the consumption of reactants and/or chain is terminated as free radicals are consumed.