Mark the correct option for the `K_(f)` .
I. `K_(f) `depends on nature of solvent.
II. `K_(f)` is also known as freezing point depression constant or molal depression constant.
III. `K_(f)` is known as cryoscopic constant.
IV. `"Unit of "K_(f)=Kkg" mol"^(-1)`.
V. `M_(2)=(K_(f)xxW_(1)xx1000)/(DeltaT_(f)xxW_(2))`. where`W-(2)` is the mass of solute haveing molar mass of `M_(2)` present in `W_(1)` gram of solvent.

Options

A. I, II and III
B. I, II, III and IV
C. I. II, III, IV and V
D. II, III, IV and V

Answer

B

Explanation

(V) option is wrong correct formula :
`M_(2)=(K_(f)xxw_(2)xx1000)/(DeltaT_(f)xxw_(1))`