Correct Answer - D
For a dilute solution, the depression in freezing point `(Delta T_(f))` is directly proportional to molality (m) of the solution.
`Delta T_(f)prop m` or `Delta T_(f)=K_(f)m`
Where, `K_(f)` is called molal depression constant or freezing point depression only on nature of the solvent and independent ofcomposition of solute particles, i.e., does not depend on the concentration of solution.
