Classification of Hydrocarbons The compounds containing only carbon and hydrogen in their molecules are called hydrocarbons. Hydrocarbons are classified into two categories known as open chain hydrocarbons and closed chain hydrocarbons. Open chain hydrocarbons are also called aliphatic hydrocarbons or acyclic hydrocarbons.Open and closed chain hydrocarbons Let us observe … [Read more...] about Classification of Hydrocarbons