In laboratory terms, what is the process called when combining substances to create a compound not present initially?

• A. Reaction
• B. Polymerization
• C. Synthesis
• D. Combustion

Answer: (C)

Synthesis refers to putting together simpler substances to form a new compound that wasn’t present at the start. This is exactly what the scenario describes: combining starting materials to create a product that didn’t exist initially. A reaction is a broad umbrella term for any chemical change, which can include rearrangements or energy changes and doesn’t always emphasize making a new compound. Polymerization is a specific type of synthesis that builds polymers from monomers, so it’s more about a particular outcome. Combustion is a rapid oxidation process with energy release that yields specific new products, making it a distinct type of reaction rather than the general idea of forming a new compound from combining substances.