Question

propane burns in air to produce carbon dioxide and water. what is this type of chemical reaction called?
synthesis
combustion
decomposition
single replacement

Explanation:

• Synthesis: Involves combining substances to form a more complex one, not matching propane burning.
• Combustion: A reaction where a substance reacts with oxygen (from air) to produce heat, CO₂, and H₂O, which matches propane burning (propane + O₂ → CO₂ + H₂O).
• Decomposition: Breaks a compound into simpler substances, opposite of what's happening here.
• Single replacement: One element replaces another in a compound, not applicable here.

Answer:

B. combustion