Explanation:Solution: The homogeneous mixture of one or more elements, molecules or compounds is known as a solution.Components of Solution:A solution has two components.Solute:- The component of the solution which is present in less quantity is called the solute.Solvent:- The component of a solution which is present is the maximum quantity in a given solution is called the solvent.Every solution is made with a definite or fixed ratio which defines its composition.Aqueous solution: The solution in which the solvent component is water is known as an aqueous solution.Ionic reactions:The reaction which takes place between ions (cation or anion) is called an ionic reaction.Most of the aqueous solutions undergo ionic reactions.Extraction of metals:The process of getting the pure metal from its ore is called the extraction of metals.Extraction of metals is mostly done by leaching.There are three major types of leaching - Heap, Dump and Tank.Electrolysis is a method of extraction of some metals from their aqueous solutions.Electrolysis:The breakdown of chemical species by passing an electric current into their aqueous solution in presence of an electrolyte.Example - Copper, silver and gold can be extracted by electrolysis.Due to high reactivity potassium (K) cannot be extracted from its aqueous solution.