The vant Hoff factor for 0.1M Barium nitrate is 2.74. The percentage of dissociation of barium nitrate is
A. 91.2%
B. 87%
C. 100%
D. 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)
A. -0.450C
B. -0.900C
C. –0.310C
D. -0.530C
3.42g of substance of molecular weight 342 is present in 250g of water.Molality of this solution is
A. 0.4M
B. 0.04M
C. 0.8M
D. 4M