On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used.​
Solvent extraction method​

Solvent extraction method is based on the principle of preferential solubility of the solid component in a solvent. ​ ​

Example : ​
A mixture of sand and salt can be separated by this method. ​

• Salt gets dissolved in water forming a solution while sand settles down in the container. ​
• The salt solution is then decanted, and salt is separated from the solution by evaporation. ​