Final answer:
In a reaction with a single binary compound reactant, the product side typically contains compounds.
Step-by-step explanation:
When a reaction with a single binary compound reactant occurs, the product side will typically contain compounds. This is because binary compounds are composed of two elements, and when they react, they form new compounds. For example, if a binary compound like sodium chloride (NaCl) is the reactant, the product side may contain a compound like sodium oxide (Na2O) or sodium nitrate (NaNO3).