Which type of chemical reaction occurs when a compound is separated into its constituent elements?

• A. Single displacement reaction
• B. Decomposition reaction
• C. Synthesis reaction
• D. Combustion reaction

Answer: (B)

Verified step by step guidance

1. Understand the types of chemical reactions listed: Single displacement, Decomposition, Synthesis, and Combustion reactions.
2. Recall that a decomposition reaction involves breaking down a compound into simpler substances, often its constituent elements.
3. Recognize that in a single displacement reaction, one element replaces another in a compound, not breaking it down into elements.
4. Know that a synthesis reaction involves combining elements or simpler compounds to form a more complex compound.
5. Identify that a combustion reaction involves a substance reacting with oxygen to produce heat and usually carbon dioxide and water, not simply breaking down into elements.