, Hydrocarbons are compounds that contain(1) carbon, only(2) carbon and hydrogen, only(3) carbon, hydrogen, and oxygen, only(4) carbon, hydrogen, oxygen,and nitrogen, only24

Hydrocarbons are compounds comprised exclusively of carbon and hydrogen only.
A hydrocarbon is any of a class of organic chemicals made up of only the elements carbon (C) and hydrogen (H). The carbon atoms join together to form the framework of the compound, and the hydrogen atoms attach to them in many different configurations.
1. Natural gas and fuels: Many of the natural fuel sources we use are hydrocarbons. Compounds like methane, butane, propane and hexane are all hydrocarbons.
2. Plastics: Many of the plastics we use in everyday life and in industry are made from long chains of monomers, formed from petrochemicals. These petrochemicals are simply hydrocarbons of different chemical compositions.
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