Why is a solution not a pure substance?

A The solute and solvent cannot be separated.

B It is made up of one substance.

C It is a mixture between a solute and a solvent.

D It is made up of two substances that are chemically combined.

Option D) It is made up of two substances that are chemically combined.

Explanation:

The solution is not a pure substance because it cannot fit into the definition of pure substance.

Pure substance:

Pure substances consist of only one type of element.

Solution:

Solution is made up of solute and solvent. Solvent is present in high quantity while solute is present in less amount. The dissolution of solute into solvent followed like dissolve like. The polar solvent dissolve polar solute, while non-polar solvent dissolve non-polar solute. The solute and solvent combine chemically and form solution. While in mixture solute and solvent not chemically combined.

In solution solute and solvent combine chemically and form new compound.

In case of mixture solute and solvent have physical interaction and there is no chemical interaction between them.