Question

Which of the following substances, when mixed with water, do not leave a residue when passed through a filter paper?

• A. Salt
• B. Sand
• C. Corn
• D. Brown sugar

Answer 1

Answer: (A), (D)

The correct options are
A Salt
D Brown sugar

$\bullet$ Filtration is used for separating insoluble solids from a liquid. To carry out filtration a filter paper is used. The filter paper lets go of the liquid while stopping the insoluble solid from passing through.
$\bullet$ Brown sugar and salt dissolve in water, hence, they cannot be separated through filter paper.
$\bullet$ Sand and corns are insoluble in water. So, a mixture of these substances with water leaves a residue when passed through a filter paper.