ETS Major Field Test Chemistry Practice Test

Natural gas primarily consists of methane (CH4), which serves as the chief component in this fossil fuel. Methane is a simple hydrocarbon, made up of one carbon atom and four hydrogen atoms, which allows it to burn cleanly and efficiently, producing carbon dioxide and water as byproducts. This characteristic makes methane particularly valuable as an energy source for heating, electricity generation, and as a raw material in the production of chemicals.

Methane's prevalence in natural gas typically accounts for around 70% to 90% of its composition, making it the dominant species. The other hydrocarbons listed—propane, butane, and ethane—are present in much smaller quantities and are often found in conjunction with methane in natural gas deposits. However, they are not the principal component. Methane's properties and its abundance in natural gas deposits highlight its significance in both energy production and environmental considerations.