Question

Which of the following pass through the filter paper unchanged?

• A. soil and water
• B. common salt and water
• C. both soil + water and common salt + water
• D. none of these

Answer 1

The correct option is B

common salt and water

The explanation for the correct option:

Option (b)

• It is the correct option because common salt and water form the true solution which is a type of homogeneous mixture. When common salt and water solution passes through the filter paper it remains unchanged.
• Nothing will be present on the filter paper as residue as the particles of solute are microscopically tiny and passes through the pores of the filter paper.

The explanation for incorrect options:

Option (a):

• Soil and water forms a heterogeneous mixture which when passed through the filter paper the water will pass through the filter paper and will get collected in the beaker in the form of filtrate.
• Soil, as it is having big particle size will be left behind on the filter paper in the form of residue. So, option (a) is incorrect.

Option (c):

• It is an incorrect option because in the case of common salt and water, the solution will pass the filter paper unchanged as the solution is homogeneous and solute particles are microscopically tiny which cannot be separated from the solution easily.
• In the case of soil and water, it is a suspension and the solute (soil) particles are large enough due to filter paper wouldn't allow the soil particles to pass through it and will remain on the filter paper in the form of residue.

Thus, Option (b) is the correct answer.