AFOQT Practice Test

Question: 1 / 400

What characterizes a synthesis reaction?

One substance breaks down into simpler substances

One element replaces another in a compound

Two or more substances combine to form a single product

A synthesis reaction is defined by the combination of two or more reactants to create a single product. This process involves elements or simpler compounds merging to form a more complex substance. The essence of a synthesis reaction is cohesively bringing together different entities to yield a new compound, illustrating a clear transformation in the reaction.

In contrast, the other options highlight different types of reactions: the first option describes a decomposition reaction where one compound breaks down into simpler components, the second refers to a single replacement reaction where one element substitutes another in a compound, and the last pertains to combustion reactions where a substance reacts with oxygen. Thus, the correct identification of a synthesis reaction as the formation of a single product from multiple reactants is essential in understanding chemical processes.

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A substance reacts with oxygen, releasing energy

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