Which term best defines organic compounds as those in which carbon atoms are almost always bonded to other carbon atoms, hydrogen, and a few other elements?

• A. Organic
• B. Inorganic
• C. Buffer
• D. Endpoint

Answer: (A)

Carbon’s ability to form four covalent bonds creates the backbone of most organic molecules, with carbon–carbon chains or rings and attached hydrogen atoms, plus other elements like oxygen, nitrogen, or sulfur. When carbon atoms are almost always bonded to other carbons, hydrogen, and a few other elements, the substance is classified as organic. This distinguishes it from inorganic compounds, which often lack the characteristic carbon–hydrogen framework (and can include carbon bonded to elements like oxygen in forms such as CO2 or carbonates). A buffer and an endpoint refer to concepts in chemistry that describe pH stability and titration completion, respectively, not the naming of molecular types. So the correct term is organic.