Question

Sugar and sand are dissolved in water. If the mixture is filtered, ______ remains as residue.
A.Sugar
B.Sand
C.Water
D.None of the above

Answer 1

Hint: We need to know that mainly a solution contains two components and that is solute and solvent. The component which is present in smaller particles is known as solute and the component present in larger particles is known as solvent. Here, the solution mainly contains sugar and sand and these both solutes are dissolved in the solvent, which is water and there is a formation of solution. These are separated by the method of filtration. The filtration mainly depends on the size which is dissolved in the solution.

Complete answer:
We need to know that the sugar is completely dissolved in the water and it will not remain in the filter paper as a residue. Hence, option (A) is incorrect.
The filtration is a chemical or physical separation of solid particles from the liquid mixture by using a filter medium. And during filtration, the particles with large mass may leave in that filter medium and the dissolved particles will pass through that medium. Here, the sugar and sand are dissolved in the liquid. But the sugar is completely dissolved in the solution. But the sand will not dissolve in the liquid and it will remain there. Therefore, the sugar solution is passing through the filter medium and it is formed as a filtrate. And sand remains as the residue during the filtration. Hence, option (B) is correct.
The water will not form as a residue. Hence, option (C) is incorrect.
Here, the sand is formed as the residue. Hence, option (D) is incorrect.

Hence, option (B) is correct.

Note:
We have to know that the solution is mainly divided into two types according to the number of components present in the solution and that is, binary mixture and tertiary mixture. If the homogenous mixture contains only two components, which is known as binary mixture. And the example is, a mixture of sugar and water. In that, the number of components present is two and that is sugar and water. But in the second case, the solution contains more than two components. Hence, it is known as ternary mixture.