Answer:
Step-by-step explanation:
Let's identify the reaction types for each of the reactions:
Reaction a: a chlorine-chlorine bond splits into two chlorine radicals.
Reaction type: Initiation
In an initiation reaction, a bond is broken to produce radicals, which are highly reactive species with unpaired electrons.
Reaction b: a radical carbon reacts with a bromine radical to form a new carbon-bromine bond.
Reaction type: Propagation
In a propagation reaction, radicals react with stable molecules to form new chemical bonds while generating new radicals, which continue the chain reaction.
Reaction c: a radical carbon reacts with a bromine-bromine bond to form a new carbon-bromine bond and a bromine radical.
Reaction type: Termination
In a termination reaction, two radicals react with each other, effectively stopping the chain reaction. The reactants' radicals are used up, and no new radicals are generated.
So, to summarize:
Reaction a: Initiation
Reaction b: Propagation
Reaction c: Termination