Question

what type of reaction has carbon dioxide and water as the products?
combustion
single replacement
synthesis
decomposition

Explanation:

Combustion reactions typically involve a substance reacting with oxygen, producing carbon dioxide and water (e.g., burning hydrocarbons: $\ce{C_xH_y + O_2 -> CO_2 + H_2O}$). Single replacement involves one element replacing another in a compound. Synthesis combines substances into one, and decomposition breaks a compound into simpler parts. Since CO₂ and H₂O as products match combustion (like fuel + O₂ burning), the correct type is combustion.

Answer:

A. combustion