Identify the type of reaction given.
CH2=CH2(g)+H2(g)→CH3CH3(g)
(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 atoms combine with unsaturated carbon compounds to form saturated carbon compounds.
(iii) Polymerization: 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.
In the given reaction the hydrogen atoms are combining with the carbon atoms. The carbon-carbon double bond breaks and single bond forms between them leading to the formation of ethane. Hence, the given reaction is an addition reaction.