Displacement and double displacement reactions are two types of chemical reactions that involve the exchange of ions or atoms between reactants.
Displacement Reaction:

In a displacement reaction, one element displaces another element from a compound.
In the refining of silver, the recovery of silver from a silver nitrate solution involves a displacement reaction using copper metal. The reaction can be represented as follows:

AgNO3(aq) + Cu(s) → Ag(s) + Cu(NO3)2(aq)

In this reaction:

Silver nitrate (AgNO3) is an aqueous solution containing dissolved silver ions (Ag+) and nitrate ions (NO3-).
Copper metal (Cu) is added to the solution.
As a result of the displacement reaction, copper displaces silver from the silver nitrate solution.
Solid silver (Ag) is formed as a grayish-white precipitate or solid.
Copper nitrate (Cu(NO3)2) is formed in the solution.
This reaction is commonly used in the extraction and purification of silver from various silver-containing compounds or solutions. It allows for the conversion of soluble silver ions into solid silver, which can then be collected, separated, and further purified to obtain pure silver metal.