After preparing tea, we need to remove the tea leaves. This is done by the help of a strainer. To remove any insoluble component from a mixture of insoluble solids and a liquid, a filter can be used. Depending upon the size of the solid to be removed, the size of the pores of the filter can be selected. Various substances like filter paper, sand, cotton, charcoal, thin cloth etc., can be used as filters.
Which of the following cannot be separated by filtration?

Options

A. sand and water
B. Mud and water
C. Salt and water
D. Sawdust and water

Answer

C

Explanation

Salt is soluble in water hence cannot be separated by filtration.