Question

Consider the equation S + O2 → SO2. What type of reaction is this?
synthesis
decomposition
single displacement
double displacement

Answer 1

Here are the general forms of those four reaction types. You tell us which one this reaction is.

Synthesis:\[A+B \rightarrow AB\]Decomposition:\[AB \rightarrow A+B\]Single Replacement:\[A+BC \rightarrow AC+B\]Double Replacement:\[AB+CD \rightarrow CB+AD\]