Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science Practice test

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What is the general result of a composition reaction?

Two products are formed
A single product is formed from reacting substances
An element is produced from a compound
A compound is broken into simpler substances

The correct answer is: A single product is formed from reacting substances

In a composition reaction, also known as a synthesis reaction, two or more reactants combine to form a single, more complex product. This process reflects the idea that simpler substances come together to create a new entity, which is a hallmark of synthesis reactions. For example, when hydrogen gas reacts with oxygen gas, they form water (H2O), demonstrating how individual elements combine to yield one compound. This reaction is characterized by the formation of just one product, distinguishing it from other types of chemical reactions where multiple products may emerge or where substances may break apart or rearrange without forming a singular entity. Understanding this fundamental concept is essential for recognizing how specific reactions are categorized in chemistry.