Question

A mixture of sand and salt can be separated by:
A. Sublimation
B. Sieving
C. Dissolving salt and sand mixture in water and then filtration
D. Dissolving salt in water and then distillation

Answer 1

Hint – Here you need to know that salt dissolves in water and sand sinks at the bottom of the container of the water. This will help you in getting the right answer.

Step By Step answer:
Here are the steps how you can separate sand and salt:
Process to separate sand and salt from the mixture:
Step 1: Add water to the mixture and stir until the salt dissolves.
Step 2: Turn your burner on and then keep the mixture over it.
Step 3: Pour the water mixture through a very fine strainer or cheesecloth filter . (Sand will remain in filter, salt and water will pass through it)
Step 4: Pour the water and salt mixture back into the burner . And allow the water to boil away and collect salt from there.
Hence, we can separate sand and salt by Dissolving salt in water and then distillation.
So, the correct option is D.

Note – To get answers to these types of problems you always need to read the options provided since you can sometimes eliminate some options and get very close to the answer. Distillation is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation. Distillation may result in essentially complete separation (nearly pure components), or it may be a partial separation that increases the concentration of selected components in the mixture.