Write the name and general formula of a chain of hydrocarbons in which an addition reaction with hydrogen is possible. State the essential condition for an addition reaction. Stating this condition, write a chemical equation giving the name of the reactant and the product of the reaction.

Alkenes and alkynes generally undergo addition reaction(s) with hydrogen. For an addition reaction to occur there must be unsaturation present in the compound. i.e., the compound must contain double or triple bonds.


For an arbitrary alkene with formula CnH2n,



For example:



This reaction is also possible in alkynes:



For example:



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