The vant Hoff factor for 0.1M Barium nitrate is 2.74. The percentage of dissociation of barium nitrate is
91.2%
87%
100%
74%
A 0.2 molal aqueous solution of a weak acid (HX) is 20 percent ionized. The freezing point of this solution is (Given Kf = 1.860C kg mol-1 for water)
-0.450C
-0.900C
–0.310C
-0.530C
3.42g of substance of molecular weight 342 is present in 250g of water.Molality of this solution is
0.4M
0.04M
0.8M
4M