Question

Which of the following processes can be useful in separating the salt from a mixture of sand and salt?
A.Sublimation
B.Filtration
C.Evaporation
D.All of the above

Answer 1

Separation is basically a method that converts a mixture or solution of chemical substances into two or more distinct product mixtures. There are different processes for different types of separation.

Complete step by step answer:
Most of the time the substances we see around are not in their pure form. They are a mixture of two or more substances. So, to separate these mixtures, we use different techniques to segregate the mixture of substances. Some of the common methods of separation are handpicking, evaporation, distillation, filtration, winnowing, Threshing and many more.
Now, to separate a mixture of sand and water, we use a process known as filtration. It is a process by which insoluble solids can be removed from a liquid by using a filter paper. It is a special type of paper which has pores that are tiny enough to let only liquids to pass through. Now, if you pass a solution through filter paper, any undissolved solid particle will get left behind on the paper whereas the liquid will pass through or we can say it will filter through. So, we have been given the components of the mixture as sand and salt. Salt is soluble in water and sand is a non-water-soluble substance. So, the insoluble sand remains in the filter paper while the filtrate contains the dissolved salt.

Hence, option B is correct.

Note: Evaporation is a technique that is used in separating mixtures that are usually a solution of a solvent and a soluble solid. Moreover, there are two types of mixtures i.e. heterogeneous and homogeneous mixtures.