If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water `(DeltaT_(f))`, when 0.01 mol of sodium sulphate is dissolved in 1 kg of water, is : `(K_(f)=1.86 K kg "mol"^(-1))`

Options

A. `0.0186 K`
B. `0.0372 K`
C. `0.0558 K`
D. `0.0744 K`

Answer

C

Explanation

`DeltaT_(f) = iK_(f) m`
`= 3 xx 1.86 xx 0.01//1`
`= 0.0558 K`