Open chain hydrocarbons Closed chain hydrocarbons

Open chain hydrocarbons	Closed chain hydrocarbons
i.              A hydrocarbon in which the chain of carbon atoms is not cyclic is called the open chain hydrocarbon. ii.            All aliphatic hydrocarbons contain open chains.	i.              A hydrocarbon in which the chain of carbon atoms is present in a cyclic form or ring form is called the closed chain hydrocarbons. ii.            All aromatic hydrocarbons contain closed chains.