The magnitude of is

1. Nature of solute only
2. Nature of the solute and the concentration of solution
3. Nature of the solvent and the concentration of solution
4. Nature of solvent only

Solution: 3. Nature of the solvent and the concentration of solution

The freezing point shift ΔT_f (also known as the freezing point depression, Td) is calculated as follows:

ΔT_f  = (T_f of pure solvent) – (T_f  of solution)

This shows that the magnitude of ΔT_f  depends upon the nature of the solvent and the concentration of the solution

ΔT_f is also equal to Kf * (molality of solution), where Kf is the freezing point depression.