The conversion of propene to polypropylene is an example of _________ reaction.
(i) Substitution reaction: Reaction in which an atom or a group in a compound is replaced by another atom or a group.
(ii) Addition reaction: Reaction in which unsaturated carbon compounds reacts with other molecules to form saturated carbon compounds.
(iii) Polymerisation: Process in which a large number of simple molecules combine to form the complex molecule.
(iv) Combustion reaction: Reaction in which hydrocarbons combine with oxygen to form carbon dioxide and water along with heat and light.
The conversion of propene to polypropylene is an example of a polymerisation.