The unit of freezing point depression constant is

Options

A. `K mol^(-1)`
B. `K kg^(-1) mol^(-1)`
C. `K kg mol^(-1)`
D. `K kg^(-1)`

Answer

C

Explanation

`DeltaT_f=K_f xx m`
`K_f = (DeltaT_f)/m = K/(mol kg^(-1))=kg mol^(-1)`