Answer : The correct option is, screening
There are various methods for separation of mixture.
Magnetism : It is a method of separation in which the components of the mixtures separated by using the magnets to attract magnetic materials. For example : iron and sand mixture
Filtration : It is a method or separation in which the insoluble solid separated from the liquid by using porous material. For example : sand and water mixture
Screening : It is a method of separation in which the mixture is separated on the basis of the particle size. For example : sand and stone mixture
Separation by density : It is a method of separation in which the mixture is separated when the substance are in different phase. For example : oil and water mixture
As per given mixture of sand and stone, the screening method is used for their separation because the different particle size.
Hence, the best method used to separate the given mixture of sand stone is, screening.
Actually, distillation is used to separate liquids from nonvolatile solids, as in the separation of alcoholic liquors from fermented materials, or in the separation of two or more liquids having different boiling points, as in the separation of gasoline, kerosene, and lubricating oil from crude oil.
Separation by density filtration.
Density filtration is the method of separation in which mixture of two or more materials are separated on the basis of their density variation whereas in magnetic separation materials are separated on the basis of their magnetic properties. In the given mixture of iron and lead both the materials shows magnetic properties. So separation by density filtration would be best.
separation by density
the actual answer is separation by density. what do you think happens when you heat up oil!?!?. so the answer is: separation by density
the answer would be screening
answer; economic order quantity;
it is stable as it is in group 0 which have full outer shells of electrons