PSI Barbering Practice Exam

Organic chemistry is the study of substances that contain which element?

1. Sodium

2. Carbon

3. Hydrogen

4. Oxygen

The correct answer is: Carbon

The study of organic chemistry is fundamentally centered on carbon and its compounds. Carbon is unique due to its ability to form four covalent bonds with other atoms, which allows for the creation of a vast array of complex molecules. This versatility enables the formation of chains, branches, and rings in organic compounds, leading to an immense diversity of structures and functions. While hydrogen, oxygen, and other elements often accompany carbon in organic compounds, the defining characteristic of organic chemistry is the presence of carbon itself. For example, hydrocarbons, which are essential organic compounds, consist solely of carbon and hydrogen. Thus, the focus on carbon as the central element highlights its critical role in the chemistry of life and the development of various organic materials.