A white insoluble solid forms when aqueous sodium chloride reacts with aqueous silver nitrate. This reaction is an example of

In $\mathrm{NaCl(aq) + AgNO_3(aq) \rightarrow NaNO_3(aq) + AgCl(s)}$, the ions exchange partners and insoluble white silver chloride forms. That makes it a double displacement reaction of the precipitation type.