What is the definition of a hydrocarbon?

A hydrocarbon is defined as an organic compound that consists solely of hydrogen and carbon atoms. This clear and specific definition highlights that hydrocarbons do not incorporate any other elements in their structure, making them a foundational class of organic compounds foundational in organic chemistry.

Hydrocarbons can be classified into various categories based on their structure, such as aliphatic (which includes alkanes, alkenes, and alkynes) and aromatic hydrocarbons, all of which adhere to the core definition. The presence of only these two elements distinguishes hydrocarbons from other organic compounds that may incorporate additional elements such as oxygen, nitrogen, or sulfur, which are found in the other options provided. This specificity is essential in understanding the unique properties and reactivities of hydrocarbons compared to other types of organic compounds.