Question

What is the type of chemical reaction that occurs when two molecules combine to form a single molecule?

Answer 1

The type of chemical reaction that occurs when two molecules combine to form a single molecule is called a **synthesis reaction** (also known as a combination reaction). In this type of reaction, two or more reactants combine to create a more complex product. An example of a synthesis reaction is the formation of water from hydrogen and oxygen gases:

\[ 2H_2 + O_2 \rightarrow 2H_2O \]