1)

The freezing point (in °C) of solution containing 0.1 g of  K3[Fe(CN)6] (molecular weight 329) in 100 g of water (Kf=1.86Kkgmol1) is 


A) 2.3×102

B) 5.7×102

C) 5.7×103

D) 1.2×102

Answer:

Option A

Explanation:

Vant Hoff's factor (i)=4(3K++[Fe(CN)6]3) 

Molality= 0.1329×1000100=1329

    Tf=iKf.m=4×1.86×1329=2.3×102Tf=2.3×102oC

(As freezing point of water is 00C)