Question

As the concentration of a solute in a solution increases, the freezing point of the solution ________ and the vapor pressure of the solution ________.

Answer 1

This is based on the study of colligative properties of solution.
Now, Applying Raoult's law, it states that when the amount/concentration of solute increases, the freezing point of the solution decreases and the vapour pressure of the solution is also decreases.

As the vapour pressure decreases, the boiling point of the solution elevated and it's freezing point decreases.