Question

You are given a mixture of sand, salt, water, and oil. Select the correct sequence of method of separation of components of the given mixture.

• A. Crystallisation → Centrifugation → Separating funnel
• B. Filtration → Separating funnel → Crystallisation
• C. Separating funnel → Crystallisation → Centrifugation
• D. Filtration → Separating funnel → Centrifugation

Answer 1

The correct option is B Filtration → Separating funnel → Crystallisation

Salt dissolves in water to form a solution. Oil is immiscible in water and keeps floating on the water surface. Sand in water is a suspension that settles down when kept undisturbed for a while.

• To separate the components of the given mixture, first we can perform filtration, so that sand can be removed from the mixture.
• Then, we can remove the oil layer from the mixture by using separating funnel.
• After that, crystallisation can be performed to remove the salt from the solution.

Therefore, we can follow the given sequence:
Filtration → Separating funnel → Crystallisation