Which of the following has the same van't Hoff factor $(i)$ as $K_3[Fe(CN)_6]$?

The freezing point of an equimolal aqueous solution will be highest for:

Which of the following solutions will have the highest boiling point?

Calculate the amount of $KCl$ $(MW=74.5 \ g \ mol^{-1})$ required to depress the freezing point of $500 \ g$ of water by $2 \ K$ (in $g$)? $(K_f=1.86 \ K \ kg \ mol^{-1})$

Which of the following solutions will show the maximum depression in freezing point when the concentration is $0.1 \, M$?

$A^{2+}$,$B^{2+}$ and $C^{-}$ form an ionic complex like $A_{x-2}[B(C)_x]_2$. If the complex is $75 \%$ dissociated in a solvent with $i=4$,the coordination number of $B$ is: