What is an example of a synthesis reaction?

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A synthesis reaction, also known as a composition reaction, is characterized by two or more reactants combining to form a single product. The reaction represented by A + B → AB clearly illustrates this concept, as it shows the combination of the individual reactants A and B to form a new compound AB.

In this type of reaction, the reactants are simpler substances, and they unite to create a more complex product. The formation of AB from A and B demonstrates how elements or compounds can join together chemically. This process is fundamental in both inorganic and organic chemistry, as it can explain the formation of various compounds from their constituent elements.

In contrast, the other reactions listed represent different types of chemical processes. For example, the second reaction illustrates decomposition, where a single compound (AB) breaks down into its components (A and B). The third reaction depicts a single displacement reaction, where an element (A) displaces another in a compound (BX). Finally, the fourth reaction is a double displacement reaction, where elements in two different compounds exchange places. Each of these reactions highlights distinct chemical behaviors that differ from the synthesis reaction described in the first option.

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