Which of the following best describes a combination reaction?
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A.
A compound breaks down into simpler substances
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B.
A reaction where a product releases gas
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C.
Two elements combine to form a compound
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D.
Ions exchange between two compounds
Correct Answer:
C. Two elements combine to form a compound
Explanation:
The correct answer is Option C: Two elements combine to form a compound.
A combination reaction, also known as a synthesis reaction, occurs when two or more simple substances or reactants merge to create a single, more complex product. This process is characterized by the formation of new chemical bonds as the individual elements or molecules unite. For example, when hydrogen gas and oxygen gas react to form water, they undergo a combination reaction. This differs from decomposition, where a compound breaks apart, or replacement reactions, where elements or ions are swapped between different compounds.
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