If a 0.4 molal solution of a nonvolatile solute in organic solvent decreases its freezing point by 2.4 K., then the molal depression constant of solvent will be

Which of the following colligative properties is useful to determine the molar masses of proteins, polymers or colloids, with the greatest precision?

Calculate the van't Hoff factor of a centimolar solution of potassium ferrocyanide if it is $60\%$ dissociated at $300$ K.

$5$ g urea is dissolved in $100$ g water. Find the amount of glucose to be dissolved in $120$ g of water so that the boiling points of both solutions will be the same.
[Molar mass of urea $= 60$ g $\text{mol}^{-1}$ & Molar mass of glucose $= 180$ g $\text{mol}^{-1}$]