compounds that consist of carbon and hydrogen only are known as what?

Compounds that consist of only carbon and hydrogen are known as hydrocarbons. Hydrocarbons are a class of organic compounds made up exclusively of carbon (C) and hydrogen (H) atoms. They can be found in various forms such as alkanes, alkenes, alkynes, and aromatic hydrocarbons, depending on the types of bonds and structures they have. Hydrocarbons are fundamental in organic chemistry and are also widely present in fuels like natural gas and petroleum.