Which of the following `0.1 M` aqueous solutions will have the lowest freezing point?

Options

A. Potassium sulphate
B. Sodium chloride
C. Urea
D. Glucose

Answer

A

Explanation

In case of `K_(2)SO_(4)`, we get two `K^(+)` and one `SO_(4)^(2-)` ions. A total of three ions which is maximum number of particles formed in any of the given substances. `(i_(NaCl)=2), (i_("glucose")=1)`
Hence, `K_(2)SO_(4)` has maximum `DeltaT_(f)` or minimum freezing point.