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Alkanes are saturated hydrocarbons. Saturated means that the hydrocarbon has only single bonds and that the hydrocarbon contains the maximum number of hydrogen atoms for each carbon atom. Unsaturated hydrocarbons contain multiple bonding and contain less than the maximum number of hydrogens per carbon.
Types of hydrocarbons. A hydrocarbon can exist as a gas (propane or methane), liquid (benzene or hexane), waxes or low melting solids (like naphthalene) or polymers (like polyethylene). There are four types of hydrocarbons namely saturated hydrocarbons, unsaturated hydrocarbons, cycloalkanes and aromatic hydrocarbons.ycloalkanes These are hydrocarbons that have one or more carbon rings. These rings have hydrogen atoms attached to it. Aromatic hydrocarbons These hydrocarbons have a stable structure and they have one aromatic ring. An example of one of the simplest aromatic hydrocarbons is benzene. These are also known as Arenes.