Solutions $A$,$B$,$C$ and $D$ are respectively $0.1 \ M$ glucose,$0.05 \ M \ NaCl$,$0.05 \ M \ BaCl_{2}$ and $0.1 \ M \ AlCl_{3}$. Which one of the following pairs is isotonic?

$K_2HgI_4$ is $40 \%$ ionized in aqueous solution. The value of its van't Hoff factor $(i)$ is:

$A$ solution containing $0.85 \ g$ of $ZnCl_2$ in $125.0 \ g$ of water freezes at $-0.23 \ ^\circ C$. The apparent degree of dissociation of the salt is ($K_f$ for water $= 1.86 \ K \ kg \ mol^{-1}$,atomic mass: $Zn = 65.3$ and $Cl = 35.5$)

Carnallite in solution in $H_2O$,shows the properties of

Determine the expected value of $\Delta T_{f}$ for $1 \ m$ $CaCl_{2}$ solution if $1 \ m$ urea solution has $\Delta T_{f}$ value '$x$' $K$.

In equimolar solutions of glucose,$NaCl$,and $BaCl_2$,the order of osmotic pressure is as follows: